I bought most of the stuff for my build yesterday without any major problems. 0 for about 30 getting Koreans to respond before I finally just decided to ignore them all, but regular NA/EU and especially those PLAYERINTERACTION all-stars, the Russians, were all fine. Selling does suck though. I got a Lion's Roar and a Nurse card while leveling and haven't been able to get rid of either. Looks like some serious price-fixing going on with the Nurse anyway, so not really in a rush on that one.
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Semi-related, I'm playing CoC for the first time, and wondering why people say to hit the APS breakpoints but not go over more than a tiny bit. Like not that it's just a waste of stats, but saying to only buy 8-9% Cospri's and not any higher until you can hit the final breakpoint with a 14% one. I'm pretty sure I want to go the dual-sword route so until I understand how the APS thing works I'm not sure what %'s I should be looking for on the two swords. Especially since I'm still deciding between Devoto and Starkonja too.
Edit: In case it's not obvious, I'm playing Cyclone with CoC Frostbolt/Ice Nova.