I got a Gc, and the GB player (with disc) from the flea market and a yard sale for less than $10 total last year. GC was missing power cord....I had a spare anyhow. Came with a 007 game and 2 memory cards too.
On a side note...I did grab that other GB Player that was being talked about...the one with FFVI and Castlevania Double Pack. I already have more than enough Gamecubes and GB players 2 of my 3 are on "perma loan" with my best friend and the other with my brother. and all 3 of my Nintendo DS Lites are with them and my dad.
I couldnt NOT buy that GB player and 2 games. I noticed Castlevania almost goes for the 30 he was asking for all of it.