I dunno, I bought the thing with a 3 1/2" enclosure and PSU for less than that. NZ$48 inclusive from Easycomm if I recall correctly.
Flashcards are shipping a 2.5" USB2 drive enclosure for around $26 at the moment, I've just bought a couple for running backups :-)
http://www.flashcards.co.nz/catalog/product_info.php?cPath=55_67&products_id=179
No power needed, although if you want (suggested for long data transfers) you can string on a second USB cable (supplied), that's used only for power.
-jim
