Why Are There So Many Used Rogue ST-100's Being Offered For Sale?

I noticed this as well and if the ST100 sounds anything like my Cronus Magnum III then it's going to be an incredible piece.  I'd like to try one to compare.

The ST100 is a great amp backed by excellent customer service. Overall it’s a great value. I owned one and never had the transformer hum issues. 

Thanks all for your responses!

I've also noticed certain waves of products or brands for sale over time, which my best guess is someone lists a particular item, and then you see others follow suit and list theirs too in the hopes of selling for whatever reason. Certainly not unique to any component or brand.

People are dumping them because KT 120s are impossible to get for the foreseeable future. This is no indication of the amp’s sound quality which is really nice in all areas.