Item Identifiers for Resellers
Identify vintage items, decode tags, and assess value. Compare options, open the live tools, and use Underpriced to make faster sourcing and pricing decisions.
Tools in this category
Nike Style Code Decoder 2026: Authenticate Dunks & Jordans
Enter a Nike 6-digit SKU to identify model, colorway, and real vs fake — check your comps, covers USD, CAD, GBP, EUR, and AUD. Free calculator included.
Spot Big E Levi's in 60 Seconds: Vintage Tab Decoder 2026
Authenticate vintage Levi's — Big E vs small e, care label, Made in USA tag, and button stamps. Scan it before you buy. Free calculator included.
Spot a Mined GPU Before You Buy: Risk Checker 2026
Enter a GPU model to check if it was heavily used for crypto mining during the 2020-2022 boom - scan it before you buy. Free calculator included.
60+ Pyrex Patterns Ranked 2026: Resale Values
Check vintage Pyrex resale values instantly — Lucky in Love reaches $1,500+ while common finds go $3-8. See where your haul ranks.
Funko Pop Sticker Guide 2026: CHASE vs Convention Value
CHASE exclusives are 2-10x more valuable than standard Funko Pops. Spot fake SDCC stickers before summer demand peaks. Free calculator included.
Lululemon Size Dot Finder: Style, Date & Resale Value
Decode any Lululemon size dot code (W6BCTS-style) to find style, manufacture era, and resale value tier — scan it before you buy. Free calculator included.
Vintage T-Shirt Tags 2026: Screen Stars, Giant & Hanes
Date vintage t-shirt tags by era: Screen Stars, Giant, Hanes Beefy-T, Brockum, and Winterland, with single-stitch verification. Free calculator included.
Pokemon Shadowless Detector 2026: Base Set Values
1st Edition Shadowless Pokemon cards worth $500-$25,000. Check shadow + edition stamp to spot underpriced Charizard, Blastoise. Free calculator included.
Item Identifiers guides
What Makes a Vintage T-Shirt Worth $200?
Band tees and vintage t-shirts flip for $20-500 per shirt. Master tag dating (single stitch, screen stars), identify tour shirts vs reprints, assess graphics and fading, and source at thrifts.
Vintage Pyrex Resale: Spot $200 Patterns Before You Buy
Vintage Pyrex patterns flip for $30-200 per piece with 300-500% ROI. Learn the 12 most valuable patterns (Butterprint, Lucky in Love), how to spot fakes, and sourcing at estate sales.
Vintage Clothing Labels 2026: How to Date & Price
Learn to date and identify vintage clothing by reading garment labels, care tags, union labels, and brand tags. Complete guide to vintage clothing tag identification from the 1920s to 1990s with real resale values.