I should mention that you can actually haggle with KEH over price/shipping overseas if you call them. It depends on their current level of stock like the buckets full of F2s.
I never really understood this VAT stuff other than it was like an import/export duty tax. But I see your point. Between shipping and taxes it's a lot. The fact that the seller is willing to pay for full service on the body is certainly fair and if the lens is working well already and just requires a check, even better. Not much goes wrong with the backs other than perhaps a light trap here and there or maybe a gearing adjust for spacing. Yeah, I think if you like the way it handles, it's a very good deal.
I know you already have an appreciation for what a great piece of equipment it is. If you get this one, I'm sure you'll really enjoy it. They're truly great cameras.
And if you'd like, at some point I'd be glad to keep an eye open for Zeiss lenses for you. Just let me know. I might also be off loading some accessories of my own like a stove pipe viewfinder, couple of A-12 backs in good order, an older A-16 back to do 35mm slides with and I think an A-24 for 220 film.