For sale is a used 1977 Marshall JMP MKII Super Lead 100 Watt Tube Head. This amp is in very good condition with dings and some wear in the tolex. There is an added master volume mode. The master volume mod is definite a nice feature as you can get the amp to break up at lower volumes. Besides possibly the filter caps, everything else on the head is original. The bulb to the power switch is burnt out. This is not a big deal as it works great it just doesn't light up. The tubes are 6550s and have plenty of life left in them.