I've got a near mint condition Mr. Do!'s Castle for the 2600 up for trade. I tested it and it works perfectly (and I can't believe how excellent the music is in this game). DP rates it: $75/R7. Since I'm not a hardcore 2600 collector, I thought I'd pass this into the hands of someone who would appreciate it a lot more than I. Soooooo...
All I ask for it is three COMPLETE nes games in near mint condition. It doesn't matter to me how common they are, as long as they are games that I don't yet have complete (currently, only 300 of my nes games are complete).
I'd also trade straight up for a near mint Mega Man 1 box and cart (I've already got the manual). This would trump any other response, but other than that, all I need is a list to pick three games from.
If you are interested or have any questions, shoot me a PM.