Selling this unpopular amp could be challenging. You can sell it here, ebay or cl-locally, but the main point is that you should learn first about this amp:
1. What tubes are there and how many per each channel?
2. What's under the chasssis? What kind of resistors, capacitors
3. When it was manufactured from...to and where?
1. What tubes are there and how many per each channel?
2. What's under the chasssis? What kind of resistors, capacitors
3. When it was manufactured from...to and where?