I too am a huge Giants fan and a collector of Jerseys. This is what I have, though nothing for the moment is for sale.

1991 Darren Lewis Road Jersey (Dobbins) auto
1994 Robby Thompson Road Jersey auto
1994 Matt Williams BP Jersey (SportsWarehouse)
1995 Matt Williams Home Jersey (Dobbins) Auto
2005 Moises Alou Road Jersey (Giants COA)
2005 Pedro Feliz Road Jersey (Giants COA)
2005 Tyler Walker Home Jersey (Giants COA)
2006 Pedro Feliz TBC (MLB Holo) Auto
2006 Todd Greene TBC (MLB Holo) Auto

Other items of Note:
1997 Matt Williams BP Jersey Auto (Purchased from Cleveland Indians Stamp)
1999 Yankees Chili Davis Home Jersey
1999 Pirates Jason Schmidt Jersey
2005 Barry Zito A's Jersey