Really optimistic.
It might be my eyes playing tricks, but it looks like the wheel diameters are different front to rear (and no, it's not just the tires).
I think they are the same size and the optical illusion is down to tyre wall sizes. But I'll agree, when I looked my reaction was the same as yourself and the rears did look bigger. So being a geek I dropped an image into photoshop and drew some horizontal lines....
As for costs, well, who knows ? It's a nice car and has obviously been cared for over the years which will be important to some buyers. Too expensive for me to consider (were I in the market) but no doubt it's a starter for haggling.