A chance at any reasonably priced MX CC. Toxic green would absolutely blow my mind, really need darker colors like grey for some keyset builds I have completed or are in the works - Willing to pay up to $30 abo.
White legend RGBY - $25 but I could just wait for what sherryton will sell eventually, or for the group buy to run its course.
Graphite tenkey kit - $30.
Punisher girldc cap - $60.
Any geekhack key other than red on white, black on yellow, green on blue, white on red, and the QWERKeys version - Up to $15
Titanium Zerg and Protoss keys, I'd take the entire set if I have to but I do already own a Terran key - $50 per key abo.
I would post pictures but I think most of these things are pretty well visualized throughout the forum and I don't want to ask permission for photos and delay my post.