I'd like to get your opinions on this EKI. It's on ebay and there's something about it that I'm puzzled about. All are marked 800 except one piece that's marked, (IMO) 500. Would this be correct? As there are several of you who have the knowledge, more than I do, to tell if this is a put together or a complete original. I'd just like to be sure before I bid. Thanks in advance.