Hi im new to this forum and im not sure if this is the proper section for this but here we go. I have an ampeg B-40 head from 1973. I know is solid state and i know it is basically the same thing as the b410 and the b115 but other than that i know nothing. Does anyone have any info on this paticular head, mainly if its collectible or rare and if so how collectible. Also what is the average market price for something like this as im thinking of selling it. Thanks for any information you may have.