I always send the receiver in or toss it after a crash depending on the receiver itself and how much it cot. There be damage to the circuit board inside that you can't see; not just the obvious stuff. It is worth the postage to me. I see that you are not in the US though so sending here to Hobby services might be expensive. I'm sure Futaba has a distributor or service center closer to you.

International distributors: http://www.futaba-rc.com/futdist.html