It looks a nice, tidy, honest example in the pictures.
It looks to be exactly the same spec as mine when I got it. Rainbow seats, manual windows, no door speakers and a bee sting. It should have a bung in the aerial hole in the n/s wing. I can't make it out on the photos, so it may have been deleted. If it has, the wing will have been painted. Why?
The modernish cd player looks a bit out of place so would need changing for something more retro.
I would say that £4000 was all it's money, but no doubt there will be someone out there who will be happy to pay the full price for it. It would be a pity to miss out on it for £600. These cars don't come along very often.