Facebook Marketplace price checker
Price check any Marketplace listing before you message.
Screenshot the listing. Underpriced identifies the item, checks what it sells for on eBay, and shows your profit after fees at the seller's asking price.
Add to Chrome
Firefox
One screenshot
From listing to answer before the seller replies.
A real Marketplace listing, and the check we ran on it.
Checked Oct 5, 2026
Canon RF-S 18-45mm lens
- Asking price
- $45
- Estimated value
- $41 to $70
- Recent sales found
- 8
- Profit after fees and shipping
- -$8.35
How it works
Two ways to check.
On your phone
- 1Screenshot the listing in the Facebook app. Get the main photo, title and price in the shot.
- 2Open Underpriced and upload the screenshot.
- 3Read the result before you reply to the seller.
On your computer
- 1Open the listing in Chrome or Firefox.
- 2Click Analyze This Deal in the Underpriced extension.
- 3The result opens in the extension, so you never leave the listing.
The result
What one check tells you
Free with every check
What the item is
Identified from the listing photo and title, including brand and model when they show.
What it's worth
An estimated value range, so you can see how far the asking price is from it.
Your profit at the asking price
After selling fees and shipping, so a cheap listing that nets nothing shows up as a pass.
How many recent sales we found
A thin count means a wide range. You know how much to trust the number.
Paid plans add · from $4.99 first month
The sold prices
The recent eBay sales behind the estimate, so you can check them yourself.
Due diligence checks
What to ask the seller or inspect before you drive over.
Negotiator
A target price and three short messages to send the seller, from opener to close.
What it doesn't do
- It doesn't scan Marketplace or send deal alerts. You check the listings you're already looking at.
- It doesn't message sellers. Negotiator writes the messages, you send them.
- It works from your screenshot, not the listing page, so include the photo, title and price.
- Values come from eBay sold listings, because Marketplace doesn't publish what things sold for.
Reviews
In their words.
Reviews from resellers on the App Store, Trustpilot and the Chrome Web Store, word for word.
“It saves so much time and completely removes the guesswork.”
“Underpriced instantly became one of my must-have tools. You just open any listing and it breaks everything down for you…”
“I’ve already avoided a couple of overpriced items and found some great deals I wouldn’t have noticed on my own.”
Read more reviews:TrustpilotApp StoreGoogle PlayChrome Web Store
Check a listing freeQuestions
Before your first check.
Can I see what things sold for on Facebook Marketplace?
Not on Marketplace itself. Facebook doesn't show sold prices, and a listing that disappears may have sold or may have been pulled. That's why we check eBay sold listings for the same item and use them to estimate what it's worth.
Does it work with the Facebook app on my phone?
Yes. Take a screenshot of the listing in the Facebook app, then upload it in the Underpriced app or on the web. Include the main photo, title and price in the shot.
What about big pickup-only items like furniture?
They work, but there are usually fewer comparable sales, so the value range is wider. The result shows how many sales we found, so you can tell how much to lean on it.
Is it free?
Your first 5 checks are free, no card needed. Free checks show the estimate, fees, profit and how many recent sales we found. Paid plans start at $4.99 for the first month and add the sold prices, due diligence checks and Negotiator.
Not ready to sign up? Free tools, no account
Check the next listing before you drive.
Your first 5 checks are free. No card needed.