Working calculators
Authentication Tier ComparisonWhich authentication service for your item. COA Value CalculatorValue impact of different certification levels.Plain note about money: Some links are affiliate (eBay Partner Network). Small commission, doesn't change your price.
Gear actually worth buying
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UV-protective display frameUV glass or acrylic slows fading on signed photos and cards significantly. Worth the extra cost.
Graded card slab display caseSlabs stack, but a proper display case keeps them from rattling and scratching each other.
Autograph authentication holdersThird-party authentication (PSA, JSA, Beckett) holders protect both the signature and the provenance.
Memorabilia display shadow boxShadow boxes for jerseys and helmets. Measure before buying — jersey shadow boxes vary widely in depth.
Ball display cases (acrylic)Acrylic ball cubes stack cleanly on shelves and protect from dust without obscuring the signature.