DualShock3 (Silver) - RadioShack.com
You should have bought one a couple of days ago. The ones above were going for $23 at radio shack and they also had the black ones for $35 online. If you buy one on Walmart.com they are around $43-44 (in the store they are still $55).
eBay user name: davici67zc
Sold to: MCarmer, lopaka
Bought from: whitedragon551, fasfocus00
Sold to: chuck5766, Jelani_ellis, tankglh21, bobbarker