Clutch will end up costing somewhere between £2500/£3k once you get it done... at a specialist, not a Main Dealer, and you can be fairly sure it will need done sometime during your ownership.

Paint bubbling around the door handles is a common fault and if you have a search on the PH thread you'll see it's not an easy fix to blend into the door and can be relatively expensive panel paint for what looks like resolving a minor issue. Door mirror repairs less expensive tho.

Scuffed wheels should be less than £100 each inc refitting and balance. My mate was £500ish to repaint his front bumper to get rid of stone chips which isn't unreasonable. Condensation in the headlights is one of these things you either live with (then hope to sell to someone else who's happy to live with it) or you find out how expensive replacement units are. Similar really with any interior issues. You'd more likely live with scuffed leather in a volvo than be happy with it in an Aston. Similarly, when you eventually come to sell you'll discover folk owning tatty bangers scratching their chins and muttering when viewing a beautiful car like a Vantage with scuffed seats.

Service could be anywhere from £450 (cheapest I ever paid) if you're lucky to... a lot more (my mate had one that was around £2250) if you're not.

I wouldn't dissuade you from getting one. I loved mine and the manual box is the one to have. At the end of the day whether it's £30/33/35k you pay it's only money and it seems like a well spec'd car (personally, I couldn't live with the 06 seats or the interior colour but that's an individual thing) I doubt you'll ever get your money back if you pay anything starting with a 3 but I doubt the owner would sell it for anything starting with a 2. Vive la difference.

I doubt anyone ever looks up from their nursing home bed and regrets owning an Aston Martin V8 Vantage tho.