There was a black one up on eBay, just a couple days ago. Looks like it's gone, now. I got my chrome GX on eBay (plus quite a bit of other gear.) They seem to come in waves, going as much as a couple of months with none at auction, then all of a sudden three or four will pop up in the span of maybe a couple weeks. The key is to keep checking, and know how much you're willing to pay.
Here's the search I used, which attempts to take into account possible misspellings:
(yashica,yasica,yahica,yashcia,yaschia) (gx,electrogx,electragx,electorgx,35gx,elcetrogx,elcetragx,elcetorgx)
I'm sure others will have some additional sources for you to check. Good luck hunting... persistency and patience pay off in the end.
