Check out this offer at MicroCenter, seems to be pretty good.

Manufacturer: K-BYTE
Mfg. Part No.: 256MB-DDR
SKU: 078873
UPC: 761133828489
Price: $32.99 - $20 MIR = $12.99

Link to wesite

Link to rebate

Try to purchase/pickup at store to save $5.99 for S&H. You can also check out the other memory cards with rebates to see if anything suits your need.