I've been hooked on buying portables lately for some reason.
Wonderswan Crystal with One Piece Coliseum CIB - 37.00
NGPC mini - 26.00
Wonderswan B&W - 5.26
Pocketstation - 9.01
GBA phat - 7.00
DSi XL (broken, but seems an easy fix) - 20.01
and I'm watch at least another half dozen systems.
I've been doing something similar - I recently picked up:
NES - $20, plus 2 controllers, 2 gray zappers, and SMB/Duck Hunt
Sega CDX - $125, plus 17 Sega CD games including the Not For Resale Sonic CD, Ecco and Sega Classics 5-in-1 (kind of a steal, the seller though it was busted, but he/she had just plugged in the composite jacks wrong, works great)
Sega CDX bag - $30, I'm actually using it a lot

Game Gear - $25, plus a few games, occasionally has powering on issues, but great otherwise
I'm currently watching or trying to track down:
GB Pocket (blue)
GBA SP AGS-101 (graphite)
GB Micro (silver, black faceplate)
Neo Geo Pocket Color (stone blue, black or silver)
DS phat (my original was borrowed and lost...)
DSi XL (blue or black)
I hadn't even heard of the Pocketstation until your post.
