Trafomatic Audio Reference 300B monos

Looks vaguely like the a white Ayon Audio.
I don't have first hand experience with them. I suggest that you find reviews etc. on European web sites that have consumer reviews. You can get a sense of their real street value, avoid commercial sellers. I guess that is obvious, but it couldn't hurt too much to restate it.

We call it  PRAT =Pace,Rate or Rhythm and Timing. You still haven’t heard your alternative 300b amp with the Trafomatics? Anyway if you want a bigger power triode consider different tubes. The most common one you will encounter is the 845, but the 211 usually wins the timbre contest. If you could afford a Wavac look at some of their other amps. What speakers do you currently have?