I'm a 1.0 CE legacy player, having the same issues. Two of my roommates are also 1.0 CE legacy members, and both are having the exact same issue. Incredibly frustrating. I've tried entering my credit card/debit card, only to get the 601. I also tried purchasing Crysta, only to have the order immediately canceled and my money refunded by the vendor.

Just two more frustrating hours until we can hammer support, at least. Hopefully it can be resolved quickly.