The OBO meaning is simple: OBO means “Or Best Offer.” When a seller writes “$300 OBO,” they are asking $300 but are ready to look at lower, reasonable offers. You will see OBO most often on Facebook Marketplace, Craigslist, OfferUp and in texts about selling something.
In formal writing, OBO can also mean “On Behalf Of,” for example next to a signature. This guide explains both meanings, how OBO works on each selling app, how it compares with “firm” and “ONO,” and how to make an offer that sellers actually accept.
| Quick Facts | Answer |
|---|---|
| Full form (selling) | Or Best Offer |
| Full form (formal) | On Behalf Of |
| What it tells buyers | The price is a starting point; you can offer less |
| Where you see it | Facebook Marketplace, Craigslist, OfferUp, eBay, WhatsApp and Instagram selling posts |
| Opposite | “Firm” (the price will not change) |
| UK version | ONO (Or Nearest Offer) |
What Does OBO Stand For?
OBO has two main full forms. The context tells you which one is meant:
- Or Best Offer – used with a price in a selling post or chat. This is the meaning in about every buy-and-sell situation.
- On Behalf Of – used in emails, letters, forms or next to a name, when one person acts for another person or a company.
Easy rule: OBO + a price = Or Best Offer. OBO + a name or signature = On Behalf Of. The Cambridge Dictionary lists “obo” as a US abbreviation for “or best offer” used in advertisements. You can also check any short form with our Abbreviation Decoder.
(“$300 OBO”)
What Does OBO Mean When Selling?
When selling, OBO means the seller is open to negotiation. They have set an asking price, but they will think about any fair offer, especially if the buyer can pay fast or pick up the item today. It does not mean the seller must accept your offer.
What Does “Price Is OBO” Mean?
If a seller says “the price is OBO,” they mean the price is not final. You can reply with a lower number, and they will decide whether to accept it, refuse it or make a counteroffer.
OBO on Facebook Marketplace
On Facebook Marketplace, OBO is usually in the title or description, like “Sofa – $250 OBO.” It invites you to message the seller with your own price. Sellers who write OBO often want to sell quickly, so a polite offer with a clear pick-up time works well.
OBO on Craigslist and OfferUp
On Craigslist, OBO has been used in classified ads for many years and means exactly the same thing. OfferUp already has a “Make Offer” button, so OBO in the listing simply confirms the seller is flexible.
OBO on eBay
On eBay, the official feature is called “Best Offer.” If a listing shows this option, you can send a price lower than the Buy It Now price and the seller can accept, decline or counter it.
What Does OBO Mean on a Car Listing?
OBO is very common in used car ads. “2015 Honda Civic – $9,500 OBO” means the owner will listen to offers below $9,500. With cars, buyers usually check the mileage, service history and condition first, then make an offer. Pointing out real issues, like worn tires or a needed repair, is a fair way to ask for a lower price.
What Does OBO Mean in Text and on Social Media?
In a text, WhatsApp chat, Instagram post or Snapchat message, OBO still means “Or Best Offer” whenever people are talking about selling something. For example, “Selling my PS5 for $350 OBO, DM me” means the price can come down a little. Sellers often add “LMK if interested” in the same post. OBO is not a TikTok or Snapchat slang word with a secret meaning, so if you see it outside a selling chat, just ask the person what they mean, or paste the message into our free Slang Translator.
What Does OBO Mean in Business, Legal Documents and When Signing?
In emails, letters and official documents, OBO means “On Behalf Of.” It shows that someone is signing or sending something for another person or an organization.
Example: “Sarah Khan, OBO Bright Future School” means Sarah is signing for the school. In formal writing, it is safer to spell out “on behalf of” in full, because not everyone knows the short form.
In business and legal papers, you will often see it written as o/b/o. Common examples include:
- Payments: “Paid o/b/o John Lee” means the money was paid for John Lee by someone else.
- Letters and emails: an assistant may sign “Maria Ali o/b/o the Director.”
- Legal forms: a lawyer or agent may file a document o/b/o a client.
In these cases, the person signing should have permission to act for the other person or company. If you are not sure, ask before you sign anything “on behalf of” someone.
OBO vs Firm vs ONO vs Negotiable
These words all tell buyers something about the price. Here is the difference in one place:
| Term | Meaning | Can You Offer Less? | Example |
|---|---|---|---|
| OBO | Or Best Offer | Yes – fair offers welcome | “Bike $120 OBO” |
| Firm | The price is fixed | No – lower offers are usually ignored | “Bike $120 firm” |
| ONO | Or Nearest Offer (common in the UK) | Yes – offers close to the price | “Bike £100 ONO” |
| Negotiable / Neg. | Price is open to discussion | Yes | “Bike $120 neg.” |
| Fixed price | Set price, no discussion | No | “$120 fixed” |
How to Make a Good OBO Offer (Buyer Tips)
OBO gives you a chance to save money, but a bad offer often gets no reply. Follow these simple tips:
- Ask if it is still available first. It is polite and starts the chat well. A seller may simply reply “ofc” (of course).
- Offer about 10–20% below the asking price. Very low “lowball” offers are usually ignored.
- Give a reason. “I can pick it up today” or “I can pay cash” makes sellers more likely to agree.
- Be ready to meet in the middle. Sellers often reply with a counteroffer.
- Stay safe. Meet in a public place and check the item before you pay.
Example chat on Facebook Marketplace:
Buyer: Hi! Is the bike still available? It says $120 OBO.
Seller: Yes, it is!
Buyer: Would you take $95? I can pick it up today.
Seller: I can do $105 if you come today.
Buyer: Deal, see you at 5.
How to Use OBO When You Are Selling
- Write OBO right after the price: “$300 OBO.”
- Set your asking price a little higher than the lowest amount you will accept, so you have room to negotiate.
- Decide your lowest price before buyers message you.
- If you do not want offers, write “firm” instead of OBO.
- You can say no to any offer. OBO means you will consider offers, not accept all of them.
Common Mistakes About OBO
- “OBO means the seller will take any price.” No. The seller can reject offers that are too low.
- “OBO always means On Behalf Of.” In selling posts, it almost always means Or Best Offer.
- Sending a lowball offer with no message. A short, friendly message gets far more replies.
- Writing OBO when you will not lower the price. Use “firm” so buyers do not waste your time.
How Popular Is OBO in 2026? (Search Data)
OBO is one of the most searched selling abbreviations online. According to Ahrefs, “obo meaning” gets about 33,000 searches a month in the US and about 47,000 worldwide. The US makes up around 70% of these searches and Canada around 20%, which shows how common OBO is in North American buy-and-sell posts.
Source: Ahrefs Keywords Explorer, United States, October 2026.
Google Trends also shows that interest in “obo meaning” stays steady all year and rises in spring and summer, when many people move house, clean out storage and sell cars, bikes and furniture.
Source: Google Trends, United States, average weekly interest per period (100 = highest point). Rising searches include “obo meaning car” and “what does obo stand for.”
Where Did OBO Come From?
OBO started in printed newspaper classified ads, where sellers paid by the word or line. Short forms like OBO, ONO and “neg.” saved space and money. When buying and selling moved online to Craigslist, eBay and later Facebook Marketplace, the same short form stayed popular. You may see it written as OBO, obo or O.B.O. – they all mean the same. Want to learn more short forms? See our full texting abbreviations list.
FAQs About OBO Meaning
What does OBO mean in text?
In most texts, OBO means “Or Best Offer.” It shows that the price of something for sale can be negotiated.
What does OBO mean on Facebook Marketplace?
It means the seller is open to offers below the listed price. You can message them with a fair price.
What is an OBO price?
An OBO price is the seller’s asking price with room to negotiate. For example, “$500 OBO” means $500 is the starting point.
Is OBO the same as negotiable?
Almost. Both mean the price can change. OBO puts more focus on buyers sending their best offer.
What is the difference between OBO and ONO?
OBO means “Or Best Offer” and is common in the US. ONO means “Or Nearest Offer” and is common in the UK. Both show the price is flexible.
What does OBO mean in an email?
In an email or letter, OBO usually means “On Behalf Of,” showing that someone is writing for another person or a company.
What does o/b/o mean in business?
In business, o/b/o means “on behalf of.” It shows that a payment, letter or form is made for another person or company.
How much lower can I offer on an OBO item?
A fair offer is usually 10–20% below the asking price. Much lower offers often get ignored.
Is OBO rude?
No. OBO is a neutral, practical abbreviation used in buying and selling.
Conclusion
OBO means “Or Best Offer” when someone is selling something. It tells buyers the listed price is flexible and that fair offers are welcome. In formal writing, OBO can mean “On Behalf Of.” Look at the context: if there is a price, think “best offer”; if there is a signature, think “on behalf of.” Make polite, realistic offers, and you will get better deals.
References
We checked the meanings in this guide against these trusted sources:
- Cambridge Dictionary, “obo” – dictionary.cambridge.org
- Oxford English Dictionary, “obo, n.” – oed.com
I’m Rose Lily, a writer at MeaningFussion. For the past 3 years I’ve been writing about Gen Z slang, texting abbreviations, social media terms and internet language. I explain what people mean in texts, chats, TikTok, Instagram and Snapchat in simple words, with real examples and easy ways to reply.
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