Let me add one more datapoint, or rather two:
First, I purchased an amp last month from TMR, and the process could not have gone more smoothly. It was shipped promptly, the equipment was exactly as described, and the packaging was just about the best I've ever seen—truly, the attention to detail was over the top, in a good way.
Second, I was pleased enough with that transaction that I decided to see what TMR would offer for the extra equipment I had laying around that I didn't really have the time or interest to sell directly. This included two big monoblock amps, a phono preamp, and a relatively obscure DAC. TMR gave competitive quotes on the first two and passed on the third, which I totally understand. (I think they would have taken it on consignment, which seems fair enough.) After I accepted the quotes, TMR promptly sent Fedex labels (including an additional one that turned out to be needed after I packed everything up), sent detailed packing advice, and scheduled a home pick-up, which I appreciated. They reported that all was in order about a day after receiving the boxes, and the check arrived in the mail a couple days after that. I was quite pleased to clear out some unneeded equipment without the hassle of putting it up myself on Audiogon and dealing directly with buyers, etc. All in all, a great experience.
Of course, there will always be hiccups in commerce and especially ecommerce, and so I try to be concerned less about those kinds of problems, which are inevitable, than about how a company responds to them. Skimming the thread here, it seems to me that TMR did about as well as any business could be expected to do. I can certainly understand the OP's disappointment, but I don't think the epside reflects badly on TMR at all—quite the opposite.