Buy.com has the Kingston Apple 8GB Kit (2 X 4GB Modules) DDR3 1066MHz SODimm C7 iMac and Macbook Pro Memory - KTA-MB1066K2/8GETR for a good price.

Google Products Price : $49.99 ~ $64.95 Shipped

1. Buy.com Price : $49.95 Shipped
2. Rebate Price : -$10.00 ( Exp : 8/22/11 )
Final Price : $39.95 Shipped After Rebate