Browsing through the musical gear section on my local Craigslist page I came across a guy selling a Peavey Mark 3 bass head for $30. It's in great cosmetic shape, but of course the catch is it powers on, however no sound. I have found and received a lot of good information on TalkBass in the past so I am turning to anyone who may have knowledge of what the problem could be? I know it's a long shot to pin point it down to the exact problem without physically seeing and tampering with it and could also be any number of things causing it from not outputting and sound. However for $30 could it be a good deal to pick it up and then repair it? However I also don't want to pick it up only to find it will cost a lot to repair it, but know knows could be a nice amp.