Dealing with TMR can be easy, though with all that equipment it may take them a while to get back with you on their offer. Also, unless you just want to get rid of it at any cost, make sure you know what it is worth before accepting their offer.
On a personal experience I’m an outlier with respect to TMR. I had two good buying experiences then decided to sell some items. I had five items, the offer for three of them came back too low so I passed (one was an item I purchased less than a year ago from them). The other two I got low offers, but one I realized would be difficult to sell, there was a market glut of that piece. The other was a heavy tube amp that I did not have factory packaging for and it was over 30 years old and still original. So I accepted the offer. I was going to be in the general area on vacation so I offered to drop the items off and they inferred they would give me some credit for not having to pay for shipping, yes, TMR pays to ship the item to them. I get there and then they tell me I must drop the items off at exactly the assigned time, no changes possible. When I drop them off, it takes less than five minutes, they put the boxes on the cart and say see yah! It delayed my plan for the day for no reason, so first annoyance. Then I get paid and no credit for dropping the items off. I have no idea how much shipping would have cost them, but it probably would have been $200 minimum for me, so second annoyance. Then I see the tube amp listed for three times what they paid me for it ($500)! The amp probably should be recapped, so I thought maybe they did that, but the photos show absolutely zero work done on it so nothing to justify such a huge markup. I gave them bad feedback and nothing, I try to contact someone who works there I have met once before, nothing. So I send a direct message to them and the owner, Josh, contacts me and explains he would have done things differently … but nothing more. We exchange e-mails again which further muddied the water. Finally I tell him “is that how you keep customers happy?” and the best he can do is what can we do to make it right. I reply I’m too pissed if at this point and forget it. End of discussion.
Please don’t take this as a “stay away at all cost”, just be vigilant with them or anyone else you deal with. These companies are not your friend, they are there to make money, and maybe, just maybe, make you satisfied.