How to Find Underpriced Items on Facebook Marketplace: A Reseller's Guide
If you're a reseller, you already know the game: buy low, sell high. But with millions of listings on Facebook Marketplace, finding the genuinely underpriced items — the ones where you can clear 60% margins or more — is like finding a needle in a haystack. Unless you know where to look.
In this guide, we'll break down the exact workflow that successful resellers use to find Facebook Marketplace deals, why estate sales are the single best category for flipping, and how you can automate the entire process.
The Manual Comping Workflow (And Why It's Brutal)
Every experienced reseller knows the "comp" workflow. You find an item on Facebook Marketplace, then you open eBay and search for sold listings of the same item to see what it actually sells for. The difference between the asking price and the eBay sold price is your potential profit.
Here's what that looks like in practice:
- 1Scroll through Facebook Marketplace in your target area, filtering by keywords like "estate sale," "moving sale," or "vintage"
- 2Open eBay → Advanced Search → Check "Sold listings" → Search for the same item
- 3Compare the Facebook price to the average eBay sold price
- 4If the margin is good, message the seller immediately — the best deals go fast
The problem? This takes 2-3 minutes per listing. And most listings aren't worth your time. A serious reseller might comp 50-100 items a day just to find 3-5 deals worth pursuing. That's hours of tedious work, every single day.
Why Estate Sales Are Goldmines for Resellers
Not all Facebook Marketplace listings are created equal. If you're doing estate sale flipping, you're already playing the game on easy mode. Here's why:
Motivated Sellers
Estate sale sellers are often clearing out an entire household. They want things gone, not top dollar. This means prices are set to sell, not to profit.
Hidden Gems Everywhere
Most estate sale sellers don't know the value of what they're selling. A vintage Pyrex set listed for $15 might sell for $120+ on eBay.
Bulk Opportunities
When you find one underpriced item at an estate sale, there are usually more. One good estate sale listing can yield multiple profitable flips.
Less Competition
Most casual Marketplace browsers skip estate sale listings. Savvy resellers know that's exactly where the best margins hide.
5 Tips for Spotting Underpriced Items
After years of comping thousands of Facebook Marketplace deals, the best resellers develop a sixth sense for spotting underpriced items. Here are the patterns they look for:
Look for Brand Names in Generic Listings
Many estate sale sellers list items with generic descriptions like "old kitchen stuff" or "vintage collection." But buried in those photos might be Le Creuset, Fiesta, or Pyrex worth 10x the asking price. Always zoom into photos.
Check Lot Listings Carefully
"Selling as a lot — $50 for everything" is where huge margins hide. Calculate the value of individual items. If even one piece in the lot is worth more than the asking price, you have a deal.
Target Recently Posted Listings
The best deals on Facebook Marketplace sell within hours. Sort by newest first and check multiple times per day. If a great deal has been up for 3+ days, something is probably wrong with it.
Know Your Categories
Don't try to flip everything. Pick 2-3 categories you know well — vintage kitchenware, mid-century furniture, collectible glassware — and go deep. Category expertise is what separates profitable resellers from everyone else.
Factor in Shipping and Fees
A 60% margin on a $20 item might not be worth your time after eBay fees (12.9%) and shipping. Focus on items where the absolute profit, not just the percentage, justifies the effort. $50+ profit per item is a good target.
The Better Way: Automating Deal Discovery with Yarbit
What if you didn't have to do any of this manually? That's exactly why we built Yarbit.
Yarbit is a reseller tool that automates the entire comping workflow. It monitors Facebook Marketplace estate sale listings in your chosen zip codes 24/7, automatically compares every item's price against eBay sold comps, and sends you an email alert whenever it finds something priced 60% or more below market value.
Instead of spending hours scrolling and comping, you get a curated feed of only the best deals — with comp data, estimated profit, and a direct link to the listing. All you have to do is message the seller and go pick it up.
Start Finding Deals Today
Whether you're a seasoned reseller doing estate sale flipping full-time or just getting started with Facebook Marketplace deals, the key to profitability is finding underpriced items before anyone else. The manual approach works, but it doesn't scale. The resellers who win long-term are the ones who work smarter, not harder.
Ready to stop scrolling and start flipping?
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