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.