Is there a link to the photos?
If its such a good price what are the reasons for selling? Do they seem legitimate/convincing reasons?
Check for any signs that it has been in an accident (abrasion on the bar-ends, or pegs for example).
Is the rear tyre original? If it's been treated gently it might well be at 7000km...
Has it had brake pads replaced, especially at front
Has it been serviced? Check the book, or invoices.
Look at the oil, is it the right level and decent colour?
Has the chain been looked after, adjusted properly, and not bone-dry?
You know, I'm not sure about the dimensions of the discs for the Glee...
I see your point about the corrosion risks!
I think kodkod is saying there's nothing particular to the glee to worry about at that age/miles except corrosion Eg see
HEREJust some general points there to think about...Good luck!