Hmm... What would I want to add to my collection....?
Well, on the outlandish, rare, and not gonna happen side, a C65 would be quite cool. :-)
On the new, yet retro cool, a C-One would be quite nice. (I almost bought one off red, but my family and monetary situation at the moment doesn't allow me to off and spend a few hundred bucks like I used to.)
On the "looking for a garage-sale steal" I want one of those GVP A530 sidecars for an A500. Should be in beautiful shape to go with the NOS A500, though. :-P
And, finally, for the completely reasonable... I want to get my SX-64 working. I just haven't had the time to clean it all up and go in and sort out what's bad on it. It's just a chip or solder joint on the main board. The unit powers up and I've tested the display, so I'm quite confident it's fully repairable. :-)