It's a good price mate, stick to your guns, you'll always get people like that sadly, just ignore them. What I would say it would be worth doing is getting the badges back on the boot lid, just makes it look a bit more original.
Generally though, that looks a little cracker.

If I was you I'd take the seven spokes off and sell those separately (there's always someone wants them) , stick the original wheels back on and it'll still look fab and you should still get your price I would think.