You found a lamp in your grandmother's attic, a jacket at a thrift store, or a box of old cameras at a garage sale, and the first question is always the same: what is this worth? The honest answer is rarely a single number. It is a range, and it comes from one place more than any other: what people recently paid for the same thing.
This guide walks through the method that dealers, resellers and auction houses use, in an order you can follow at home. It works for almost anything that has a resale market, from a designer handbag to a cast iron pan.
How Is the Worth of Something Determined?
An item is worth roughly what buyers have recently paid for the same item in similar condition. That is its market value. Asking prices, sentimental value and what it cost new all feel relevant, but none of them tells you what a buyer will hand over today. Recent sold prices for close matches do.
Three things move that number more than anything else: exactly what the item is, the condition it is in, and how many people want it right now. The steps below deal with each in turn.
Step 1: Identify Exactly What You Have
You cannot price something until you know what it is, and "an old vase" is not specific enough. Two vases that look alike from across a room can differ in value a hundredfold because one has a maker's mark and the other does not.
Turn the item over and look for:
- A maker's name, logo or stamp. On pottery and porcelain it is usually on the base. On furniture, look inside drawers and on the back. On clothing, it is the label.
- A model or serial number. Electronics, cameras, tools, watches and toys almost always carry one, and it is the single best search term you have.
- Materials. Solid wood or veneer, sterling silver or plate, leather or vinyl. The material often decides the price bracket before anything else does.
- Size and completeness. Note the dimensions, and whether the original box, manual, lid, charger or accessories are present.
Write all of it down. The more precise your description, the closer your comparisons will be. For specialist items, our guides on identifying antiques, reading coin value and reading jewelry stamps go deeper.
Step 2: Look at Sold Prices, Not Asking Prices
This is the step most people skip, and it is the one that matters most. A listing that says $400 tells you what one seller hopes to get. It does not tell you that anyone paid it. Items priced too high sit unsold for months, so the active listings you see first are often the most optimistic ones.
What you want is completed sales. Recent eBay sold listings are the largest public record of what used items actually sell for: search for your item, then filter the results to show sold items only. Auction house archives and the sold sections of other marketplaces serve the same purpose for specialist pieces.
Aim for five to ten sales of the same item, ideally from the last few months. Prices drift with fashion, collector interest and the season, so a sale from three years ago is weaker evidence than one from last month.
Step 3: Match the Condition
Once you have a list of sales, compare condition carefully, because it is usually what separates the cheap sales from the expensive ones. Look at the photos of each sold listing, not just the price.
- Wear and damage. Chips, cracks, stains, scratches, missing parts and repairs all pull the price down. On some items a single flaw halves the value.
- Working order. For anything mechanical or electronic, "tested and working" and "for parts" are two different markets.
- Completeness. A boxed camera with its lens cap and manual sells for more than the camera alone. Collectors pay a premium for the full set.
Be strict with yourself. Most people rate their own items one step better than a buyer would.
Step 4: Read a Range, Not a Single Number
With five or more comparable sales, line the prices up from lowest to highest. You will almost always see a cluster in the middle and a few outliers at either end: a bargain that sold in a hurry, or a premium example that sold to a determined collector.
The middle of that list, the median, is a better guide than the average, because one unusual sale cannot drag it far. The spread between the low and high ends of the cluster is your realistic price range. If your item is in better condition than most of the sales, it belongs near the top of the range. If it is worn, it belongs near the bottom.
Step 5: Account for Where and How You Sell
The same item can sell for different amounts depending on the channel. Online marketplaces reach more buyers but take fees and require shipping. A local sale avoids both but reaches fewer people. A dealer or pawn shop pays on the spot, and pays below the market range because they need to resell at a profit.
Time matters too. Pricing at the top of the range usually means waiting longer for the right buyer. Pricing in the middle usually sells faster. Neither is wrong; decide which you care about more before you list.
Can I Take a Picture of Something and Find Out What It Is Worth?
Yes, for a first estimate. A photo is enough to identify many items and to check what similar ones have sold for. Google Lens is good at the identification half: it finds visually similar items on the web, which gives you names and search terms to work with.
A valuation app goes a step further and does the comparison for you. Primo Worth is one: you snap a photo of an item, and it identifies what it is and checks the value against recent eBay sales where they exist. The result shows an estimated value, which is the median of the comparable sales it found, a price range, things to consider before you sell, and the recent sold listings themselves with photo, price, condition and sold date, so you can judge the matches yourself. It has separate modes for jewelry, antiques and coins that add a read-out on materials, marks, backstory and what drives the value.
A photo has limits, and it is worth being clear about them:
- It cannot confirm age, maker or what a piece is made of. It can read a visible mark, but it cannot test metal, date wood or tell a careful reproduction from the piece it copies.
- Not every item has comparable sales. Rare, unusual or very local items may have none. In that case an app can only offer a rougher estimate from web prices or retail ranges, and sometimes no value at all.
- It sees what the photo shows. A good photo in daylight, with any marks or labels in focus, gives a much better result than a dim one.
Primo Worth is free to download, and you can try three scans free, enough to test it on the items you are most curious about.
When You Need More Than an Estimate
An estimate is the right tool for deciding whether something is worth selling, keeping or looking into further. It is not the right tool for insurance, estate settlement, tax or legal purposes. For those, you need a professional appraisal, a written opinion from a qualified person who has examined the item in hand. An AI estimate is not a professional appraisal, and no photo app can stand in for one.
The same applies when an item might be worth a lot. If your research points to a four-figure value or more, take it to a specialist dealer or an auction house before you sell. Many auction houses will give an auction estimate from photos, and they have every reason to get it right because they earn a commission on the sale.
What Is This Worth, in Short
The worth of an item is what buyers have recently paid for close matches. To find it, identify the item as precisely as you can, gather five to ten recent sold prices rather than asking prices, compare condition honestly, and read the middle of the range rather than the highest sale. A photo app can do the identifying and comparing in seconds and is a good first step, but for anything valuable, or anything you need in writing, a human expert is the next one.
