The Nace M3-7R is a very nice single ended combo amp with a tone similar to the classic Champ, but with modern improvements. The amp will take any octal power tube, without re-biasing, and currently has a 12ax7 preamp tube and a 6v6 power tube. ~7 watts with a 6v6. 10-12 watts with a 5881/6L6 or El34.
Nace Amps discontinued some years ago, but this would have been about $1700 new at the time. It was the final version of this model (M3 instead of M1 or M2). I am not the original owner, but it is in great condition. The only issue I’ve had is the digital reverb stopped working one day. These days, there are so many awesome reverb pedals, that I rarely used the built-in reverb anyways. The I’ve also ran other amps through the speaker and cab for recording. It has a great open-back cab tone with the the 12” Celestion Greenback.
Some videos of me playing the amp with a couple different guitars below: