Buy.com has SanDisk 16GB Memory Stick PRO Duo $63.24 + free shipping.
SanDisk Memory Stick PRO Duo cards give you plenty of room to capture and store your world in Sony and Sony Ericsson digital devices. And they're built to last, so you can be confident that all of your precious files will be there when you want them.
Features
High-speed data transfer rate of 15Mbps
The fast transfer rates help prevent data loss and supports DVD-quality video in real time
Advanced security with Access Control Function and MagicGate technology
SanDisk 16GB Memory Stick PRO Duo $63.24 FS 
