Steiner Sports has some interesting game used and game issued items in its current auction

http://user.auctions.shopping.yahoo.com/show/auctions?userID=steinersportsauction&u=%3asteinersportsauction

3 Game Used Yankee Stadium Locker Chairs

Jeff Nelson Game Issued 2001 WS Jersey

Bat Boy GU 1998 WS Jersey

Ramiro Mendoza GU 2000 WS Jersey

Authentic Signs From Yankee Stadium

Lot of 3 Game Used Yankees Bats (Paul O'Neill, Bernie Williams and Shane Spencer)

2005 Don Mattingly GU Spring Training Jersey

2005 Jorge Posada GU Spring Training Jersey

2005 Carl Pavano First Game GU Spring Training Jersey

1999 Mike Stanton GU WS Home Jersey

Gary Sheffield Signed GU Cleat