Sovtek makes very good all-tube guitar amps, and sells them for very
cheap. You should be able to find one used for $50 to $250, any of
which is a great deal. They have 50 watt and 100 watt amps using
5881 tubes and 60 watt amps using EL34 tubes which can be heard
on albums by
You & I. The 60 watt amps follow the design of a Marshall Super
Lead, except they are one channel, and sound very nice. Visit the
Sovtek web page for more info.