I purchased an Audio Research Ref 75SE amp from TMR a couple of years ago for a very good price.The amp seemed to run ok, but would not bias on one power tube when I received it. I contacted TMR, and Josh helped me resolve the issue. TMR paid for return shipping, fixed the issue and shipped it back to me at no charge, and all rather quickly as I remember. Although it was a bummer that I had to send it back for repair, they could not have handled it any better or more professionally. Electronics are prone to need repairs from time to time. It just goes with the territory in this hobby, particularIy when buying used gear.
I would not hesitate to buy from TMR again and highly recommend them.