been having a good old nosy at this aswell.
It may not be as ropey as you might think, if it's been used on a regular basis or similar, which it looks like it has the wear and tear on the motor etc should be pretty even, well run in by now,instead of a bike thats been stood up 99% of its life, never geeting a proper run.
comestics can be recified provided it's not serious damage.
It'll will go for more than 4k peeps,near 6k easily, I'll put money on it.
Give it some TLC, and it will be a totally different bike.
by the way, just for identification purposes, their is one sure fire way to tell an SP4 apart from an SP4S (SPS)... I'll leave that one with you peeps.