I maybe wrong, but the white panel on the tail looks to be too high up...? Doesn't really matter though, as it's defo the wrong colour Edit: in all seriousness, could be great project, but would need to be under 4k tbh.
Im not up to date on what's correct but as a whole it appears to be a good project, he has the carbon front mudguard and clutch cover which is great and also the square original headlight (but check if he also has the fairing for it) sounds like he's lost interest and wants it gone, anything below 3k is good news, as we all know you take a chance.
Its great he has all the correct bits, if floating front rotors are worn budget £1000 for a new set (if you can find some). Maybe another £500/£1000 for full desmo service and other bits. Don't seem so much of a bargin at £5500 ish ? There was a mk1 on ebay for sub £7k recently, which is a lot more desirable longterm .