Oh hey, sorry, yeah I got your text... just didn't hear it since phone was still in backpack after we got back! I did not actually stop by the GSC booth today so I didn't see what all they were actually selling, just heard a few things from friend who bought Snow Miku today.
If you are talking about this figure
http://myfigurecollection.net/item/158023 then I saw 2 booths with it for sale (and GSC is not selling it at their booth this year). One of them had like 5 copies that I saw (plus other nendos), but no prices shown on the Madoka. I am not sure if they were bootlegs. I don't buy nendos so I'm not sure what to really look for, but I can go by and take another look.
If you are talking about the new white/pink yukata version they're selling it online for now but not at the con.