Here is a list of some sports card and memorabilia sites.
Sports Collectors Daily –Sports collecting news site
Robert Edward Auctions –sports card and memorabilia auction company
Hunt Auctions– sports card and memorabilia auctions
Memory Lane–sports card and memorabilia auction company
Huggins and Scott Auctions–sports card and memorabilia auction company
Goldin Auctions-sports card and memorabilia auction house
Sports Card Forum–talk, buy, sell and trade
VintageCardPrices.com–checklists and price data
Game Worn Jerseys–game used jerseys and memorabilia cards
Old Cardboard–vintage sports card info and checklists
Baseball Card Exchange–the largest inventory of unopened wax on the internet
Discount Hobby Boxes-sports card boxes
Title Rings – information on collecting Super Bowl and other championship sports rings, authentic and replica.
T206 Basic overview of T206 set, rare cards, recent sales
Investing in Baseball Cards – overview of some of the best players to invest in and how to go about it
Vintage Graded Baseball Cards -information on collecting older, graded baseball cards
Vintage Graded Basketball Cards – some of the best basketball cards ever made and links to purchase them
Vintage Graded Football Cards – get information and links to some of the best older football cards
Vintage Graded Hockey Cards – love hockey cards? You’ll love this site
Gretzky Rookie Cards – all about collecting The Great One
NFL Team History – Your Source for NFL Football Information – NFL football information site. Featuring team history, franchise history, records, draft history, tickets, rules, and cheerleaders pages.