I purchased a small lot off of Ebay of these 1999 SP's the other day it consisted of 5 total cards with four different player.
1) Corey Koskie # CK.
2) Jeremy Giambi # JG.
3) Mike Kinkade # MK X2.
4) Ryan Minor # RM.
Total cost was $3.53 shipped so about 70 cents a piece.