Here's what I got at Cowlitz Gamers for Kids 2012. Anything that I didn't mention a price for was part of a bundle deal.
NES:
Pyramid (cart only) - $2.50
Sega Master System:
The Ninja (complete)
Genesis:
Flicky (boxed) - $5
Lemmings 2: The Tribes (cart only)
Sagaia (cart only)
Super NES:
Final Fantasy II (cart only) - $20
PlayStation:
The King of Fighters '99 (complete) - $1.50
PS2:
Two first-party memory cards (one black, one clear blue) - $2 each
Xbox:
Stubbs the Zombie: Rebel Without a Pulse (complete) - $10
Game Boy:
Sagaia (cart only, import)
Game Gear:
Shining Force: The Sword of Hajya (cart only) - $5
Tails Adventure (cart only)
Tempo Jr. (cart only) - $2.50
Neo Geo Pocket Color:
King of Fighters R-2 (cart only) - $2
Game Boy Advance:
Atari Anniversary Advance (cart only)
GBA e-reader:
Air Hockey-e - $3
Free strategy guides:
The Official Nintendo Player's Guide
Nintendo Super Game Boy guide
The Legend of Zelda: Wind Waker: Prima's Official Strategy Guide
Photos of everything (excluding the PS2 memory cards, which I forgot about when I took the photos) can be found in this this Flickr album.
(A good amount of this stuff was purchased from fellow DP members. Thanks to all of you for the deals!)