Very good points about the parts & likely the same person - if buying I'd keep it but I'd want a very good bargain and wouldn't pay with anywhere near £500 for it given it's history. Think I'll pass
As long as its not stolen and I think this would have come to light by now it has been around so much I would say its worth £500 even if there is a split in the seat post area as the forks alone have a decent value. Somebody on here go and buy it and catalogue it on here. Clear the poor bikes name it is not its fault.
Resprayed by Jon for circa £500 the frame and forks alone would reach £1300 to £1500. As a full bike with M900 or equivalent its going to be £1800 to £2000. Just my opinion of course.
I think you're all getting ahead of yourselves. Unless I missed it, since it's gotten into this guys hands no-one has ever seen it or been able to arrange with the seller, a chance to see it. So you might want to see if you can arrange a date / time to see it first, then worry about price and condition ;-)
Joking aside, if you did manage the miraculous, I'd go with a mate. Know what I mean?