Hello to the list. I have 4 unbuilt heathkit kits. One is a powersupply in a unopen box about the size of a shoe box. the others are 1 RLC Bridge IB-5281. 1 RF Oscillator IG-5280. 1 Audio Generater IG-5282. All unbuilt kits . Anybody know what these might be worth? Rick VE7RiK