Ohh...good thread idea.
I have a Gold Mario and a Toad I can trade towards these. Will not pay crazy scalper prices as there are many rumors that reruns may be coming for some of the hard to find ones.
Also looking for Super Mario RPG for SNES and Paper Mario N64. Complete would be spiffy but probably price prohibitive. Also wouldn't mind finding any of the Mario Party games (other than 6, 7, 10) if reasonably priced. Also interested in most Kirby games especially Return to Dreamland (Wii).