Newegg.com has the PNY 512MB 200-Pin DDR2 SO-DIMM DDR2 533 (PC2 4200) Notebook Memory for a good deal.

Pricegrabber Price : $49 ~ $115 Shipped

1. Newegg Price : $42.99
2. Rebate Price : -$15.00
Final Price : $27.99 + Ship($4.99)