super bass

For quite some time now I've really enjoyed playing older class AB solid state amps and using them as a clean pedal platform, but lately I've been thinking about what it would be like to use a tube amp again since the rest of my set up has changed so much since the last time I owned one...

I have since been very much interested in some of the amps in the vintage market, namely Marshall late 60s Super Basssome or late 70s/early 80s Marshall JMPs/MKIIs/2203s. My worry though is if I were to pick one of these bad boys up what potential reliabilty issues I would run into? What...