One of the best looking on-card Basketball autographs for sale on eBay is this 1999/00 Upper Deck Retro Wilt Chamberlain Short Print. The card has received significant attention so far and look for the bidding to get hot and heavy toward auction close.
There is a small sports card website, Swinging Sportsnuts, who has a 1999 UD Retro Wilt Chamberlain Inkredible Autograph for sale priced at: $2,500.00. I would imagine that the auction currently on eBay will finish for less then that price. The seller of the card on eBay, wc_sports, previously had their Chamberlain for sale for $2,499.99.
The Chamberlain autograph is the most sought after card from the 1999/00 UD Retro Inkredible Basketball set. On June 9 a Bob Cousy autograph ended for $32.00 on 7 bids. Clearly the legend and star power of Wilt Chamberlain has collectors willing to pay four figures for this beauty.
1999 UD Retro INKredible WILT CHAMBERLAIN Auto SP
Current Price: $1,136.11
Final Price: $2,011.00