I have a base amp for sale. Its a thunderbolt 305. It is in good condition considering its age. It was part of a family members estate. I tested it and everything works as it should I was able to get 700 watts out of it with about 50 watts it. All of the tubes light up as they should. I will take $300 obo plus shipping. If interested my email addess is: kd8mtk@hotmail.com.