Amazon has 4GB (2x2GB) OCZ DDR2-800 desktop memory kit for $52 - $30 rebate = $22 with free shipping

List Price: $85.99
Mail in rebate /Discount: - $20.00
Sales price: $65.99 + Free shipping
Price After Rebate: $35.99 + Free shipping

Technical Details:
Product Features

* Product #: OCZ2N800SR4GK
* Manufacturer: OCZ Technology
* Manufacturer Item #: OCZ2N800SR4GK
* UPC: 842024006435

Technical Details

* Memory Size: 2 x 2048MB
* Memory Speed: 800MHz PC6400
* Memory CAS Latency: 5-4-4-15
* Memory Type: Dual Channel DDR2

Link to the buy: Amazon.com
Rebate form: $30 Rebate