One person raised the question about warranty, and the listings all say one year limited international warranty. I emailed a question on the warranty to Prodigital2000. They responded the same day. Here is the response:
Yes, you should be able to have it repaired in America for the first year, as long as it is is something that the warranty covers, such as parts and labour.
Regarding the closing prices being too low, somehow the 68,000 transactions and 99% positive feedback softens my concerns. It looks like they have listed about 40 of these so far and sold most of them. The currently consistent closes seem to be $550-570. I haven't seen any negative feedback on any of the closed auctions.
I'm going to purchase in a couple of weeks and will post my results.