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Posted By: Aaron Michiel

If you are buying an autographed item on E-Bay, assume it is a forgery (whether the seller is aware of this or not) unless accompanied by a very reputable and individualized certificate of authenticity (such as PSA/DNA). Same goes for game-used items. Dave Bushing/James Spence, Grey Flannel or PSA/DNA offer trustworthy and marketable (for those interested in resale) C of A's for game-used jerseys, caps, gloves etc.

These types of CofA's and reputable provenance are standard when buying an item off of a catalog auction. That level of comfort in their bidders might also explain some of the price discrepancies between E-Bay and auction catalogs.