Learn to see what others miss.
The difference between a $5 find and a $500 find is knowing what you're looking at. These guides will sharpen your eye.
Patina is built on a simple idea: the knowledge it takes collectors and dealers decades to earn should be available to anyone with a phone. These guides are where that knowledge lives.
Read them to sharpen your eye. Learn how to identify what you're holding, understand why it's valuable, and know what it's worth before you buy it, sell it, or give it away. Every guide comes back to one skill — seeing what others miss — and each one covers a different corner of the world of objects, from estate sales and inherited belongings to vintage fashion and the technology behind instant identification.
The Estate Sale Playbook
Timing, strategy, and what experienced buyers skip entirely. Everything you need to work an estate sale like a pro.
Read guide →
How to Read Maker's Marks
Decode the stamps, signatures, and symbols that reveal value. The hidden language of quality objects.
Read guide →
Vintage Denim: What's Valuable
How to spot valuable Levi's, Lee, and Wrangler pieces. What to look for and what collectors pay.
Read guide →Are Old Halloween Decorations Worth Money?
Embossed 1930s die-cuts and German lanterns sell for thousands.
→Is Your Old Cast Iron Skillet Worth Money?
Griswold and Wagner logos on the bottom date the pan and set the price.
→Is Your Old iPod, Walkman, or Game Boy Worth Money?
First generations and sealed boxes are where the value hides.
→Best Apps for Identifying Value
How AI identifies and values objects — the technology behind instant identification.
→Sorting Through a Parent's Belongings
A practical, gentle guide to the hardest logistics project.
→Are Old Vinyl Records Worth Money?
First pressings and rare labels turn a $3 record into a four-figure one.
→Is Your Costume Jewelry Worth Money?
Signed pieces from Trifari and Eisenberg sell for real money.
→Where to start
The guides above fall into a handful of families. Each one builds a different part of the trained eye, and together they cover almost everything people bring to Patina.
Estate sales
Estate sales are where trained eyes find the most value — and where the unprepared quietly overpay. These guides cover how to work a sale, what experienced buyers walk past, and how to run a sale of your own. Start with The Estate Sale Playbook for timing and strategy, then read how to price for an estate sale when it's your turn to sell rather than buy.
Inheritance and downsizing
Sooner or later, most of us face a houseful of someone else's belongings and a hard set of decisions. These guides are practical and gentle in equal measure: how to sort through a parent's belongings without losing your footing, what to do with inherited jewelry you're not sure you want, and how to help parents downsize room by room. Before anything leaves the house, it's worth learning to check value before you donate.
What things are worth
This is the heart of it: telling treasure from junk. These guides teach you to value the everyday objects that fill drawers, shelves, and garages — whether old furniture is worth anything, how to date vintage jewelry, and the five factors appraisers actually look for. The single most useful skill is reading maker's marks, the small stamps and hallmarks that reveal who made a piece and when — our guide to reading maker's marks shows you exactly where to look, and it's the same skill behind spotting real value in vinyl records, china, silverware, coins, comic books, old toys, film cameras, and costume jewelry, cast iron skillets, Pokémon cards, vintage Halloween decorations, old rugs, and old iPods, Walkmans, and Game Boys. Once you know what you have, where to sell vintage and secondhand helps you match each item to the marketplace that pays best for it — and if you're deciding which app to trust with the identification itself, see how the leading antique identifier apps compare.
Vintage fashion
Clothing and accessories hide some of the biggest gaps between price and value. Learn to spot valuable vintage denim — the Levi's, Lee, and Wrangler pieces collectors chase — and understand what "vintage" actually means so you're using the term the way buyers do.
How AI appraisal works
Behind every instant identification is a model trained on real sales data. If you're curious about the technology, how AI appraisal works explains it in plain language, and our thrift flip apps comparison looks at how the tools stack up for finding and selling secondhand items.
Put your knowledge to work.
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