Newegg.com has the Kingston HyperX 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model KHX1600C9D3K4/16GX for a good price.

Item has a rating of 4/5 from 12 reviews

Pricegrabber Price : $128.28 ~ $142.65 Shipped

1. Newegg Price : $124.99 Shipped
2. Rebate Price : -$35.00 ( Exp : 8/10/11 )
Final Price : $89.99 Shipped After Rebate