IMO there are a lot of ss amps that are better choices than the 5W tube amps out there. But he did not ask for any advice on amps, just what low priced full tube amps there are, so I gave a simple answer too.
I guess there are differences in what we consider full tube.
FULL FULL FULL: tube rectifier, tube preamp, tube poweramp, no transistors or ICs anywhere. (no way you getting a cheap new one. Gibson Falcon was on classifieds a while back. Might still be for sale.)
FULL FULL: ss rectifier, tube preamp, tube poweramp (ephiphone 5W here, AFAIK, haven't actually seen the schematics myself)
FULL: ss rectifier, tube preamp, tube poweramp, transistor or diode clipping and/or boosts (valbee here, also AFAIK, i very much doubt the boost is also using the tubes)
FOOL: ss rectifier, tube preamp, ss poweramp (so many here)