News sources have reported that as little as two weeks ago, his 2004 autographed Donruss cards were trading for $25 – not any more.

Arlington, Texas-based Donruss produced about 300 of the autographed Phelps cards in 2004 and about 5,000 “common” cards not bearing the American swimmer’s autograph, Donruss spokesman Scott Prusha said.

A search on eBay shows the current bidding:

michael phelps (Category: Olympics ): michael phelps (Category: Olympics )

• MICHAEL PHELPS 2004 ROOKIES & STARS NFL Fans of the Game Rookie Card RARE!

US $125.00 End Date: Sunday Mar-04-2012 19:49:11 PST Buy It Now for only: US $125.00 Buy it now | Add to watch list

• 2005 MICHAEL PHELPS 1 of 500 art rookie gem mint 10

US $24.99 End Date: Monday Mar-05-2012 20:06:23 PST Buy It Now for only: US $24.99 Buy it now | Add to watch list

• 2009 TOPPS HERITAGE MICHAEL PHELPS OLYMPICS USA GOLD SWIMMING AMERICAN CELEBRITY

US $6.99 End Date: Wednesday Feb-29-2012 17:59:16 PST Buy It Now for only: US $6.99 Buy it now | Add to watch list

• Michael Phelps 2004 Rookie Review Card – Graded GEM 10

US $19.99 End Date: Saturday Feb-25-2012 6:56:54 PST Buy It Now for only: US $19.99 Buy it now | Add to watch list

• Michael Phelps Top Prospect Olympic Rookie Card GEM 10

US $19.99 End Date: Saturday Feb-25-2012 6:44:27 PST Buy It Now for only: US $19.99 Buy it now | Add to watch list

• 2004 Olympics Michael Phelps Rookie Review Rookie UnCut

US $29.99 End Date: Wednesday Mar-07-2012 18:20:25 PST Buy It Now for only: US $29.99 Buy it now | Add to watch list

• Rookie Review Mag 6 w MICHAEL PHELPS True Rookie Card

US $19.99 End Date: Tuesday Feb-21-2012 21:26:34 PST Buy It Now for only: US $19.99 Buy it now | Add to watch list

• Michael Phelps SI for Kids Rookie Review 2 Card Lot!

US $59.99 End Date: Saturday Feb-18-2012 22:47:45 PST Buy It Now for only: US $59.99 Buy it now | Add to watch list

• 10) Lot 2004 RR Magazine w MICHAEL PHELPS rookie card

US $99.99 End Date: Saturday Feb-18-2012 21:00:42 PST Buy It Now for only: US $99.99 Buy it now | Add to watch list

• 10) Michael Phelps Olympic Rookie Review card PGI Gem

US $99.99 End Date: Saturday Feb-18-2012 21:02:52 PST Buy It Now for only: US $99.99 Buy it now | Add to watch list