1999 Upper Deck Retro #6 Matt Williams MLB Baseball Trading Card : Collectibles & Fine Art
BA SE BA LL - Huggins & Scott
Trading Card Lots, Sports Trading Cards, Sporting Goods - PicClick AU
PSA Magazine: 2022 August #008 by PSA Magazine - Issuu
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1999 Upper Deck Retro #6 Matt Williams MLB Baseball
Heritage Auctions, Sports Collectibles Auction 7041, Dallas Texas
Matt Williams Price List - Supercollector Catalog
Minor League – SABR's Baseball Cards Research Committee
1999 Upper Deck 10th Anniversary Team #X26 Matt
Ending - October Collectors No Reserve Collectibles Coins