I have a friend who has some new Eimac 4-1000a's and a couple of the same in pulls...He wants to sell them but wants an idea of what they are selling for...Also he has a Dentron Clipperton L amplifier that has 4 new 572b's in it and was wondering what it might be worth...Any input you can give me would be appreciated... tnx es 73 Dave K6WRF