I agree with buying new. I still have a couple of radios in the shop. One is the Hitec 7 and it was a great radio. I switched because it only programed 3 planes. I don't want to give it to anyone because of it's age. It needs a new battery too. If I gave it to someone and they crashed a plane due to a radio problem I would feel it was my fault and probably get a lot of bad feed back here about it.
As I recall it is one that has an internal battery to hold model memory? If so it has never been replaced and that would cost more then the radio is worth? It just isn't worth the risk of loosing a nice plane.
I just looked at the Graupner radios in the tower catalog last night. They look OK but I do wonder where they are made? Just wondering because of the price. Even if something is made here in the states there are still Chinese components. They are even in our TVs and refrigerators, most everything we buy today. Just the way things are these days.