Trafomatic Audio Reference 300B monos

Look like Chinese product but made in SERBIA ................

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.

They are not chinese stuff. I have seen and heard a few of their products and they are very good. Sasa Cokic wounds his own transformers and is quite well known in the European audio industry. His iron is used by some well known European triode amp makers. I was only interested to hear about his reference monos. May be I should check out on the European forums.

6 Moons reviewed some products a few years ago. And Srajan even had a custom amp made.

Have you auditioned Pass Labs' XA30.8 yet Pani?