The big difference between buying a stored M3W and a stored Gold Wing, or similar, is that the bike was probably a fairly well sorted machine when it went into storage, from a design point. The early M3W was not very well designed at all and any stored car will still have those built in problems to sort before it can be used reliably. That is in addition to all the other issues that may have occurred due to the lack of use. I know of one owner who parked his new M3W in his garage after its second rectifier failure (remember them?) in 2013 and it didn't move again until this summer. Now he is looking at a long list of work.
I have spoken to a few people that thought they were buying a bargain low mileage early car only to find they have quite a large "upgrade" bill, the bargain doesn't look quite such a good buy then. If you are "hands on" owner then the bargain can be just that, although information on the M3W is difficult with no manual available for reference. There are some real bargain early cars that have been used and upgraded, if you know what to look for.
