Fair price? under normal circumstances, definately not. But if he was doing it for money, then he should not have answered your question with "what do you think is fair?" All in all, you did the right thing.

If it still bugs you as time goes on, buy him a nice kit.

Eitherway.....he did you a good favor. Pass it along when you find a modeler in need.

Mace Gill
The Aeroplane Works