Make no mistake - you are paying for convenience and more instant gratification selling your gear to TMR Audio. This is an option some prefer to selling it yourself over a longer period of time in most cases. They are not going to pay you retail for your gear, and making a profit is how they can afford to receive, test, market, list and re-sell your gear, along with them paying for a large staff to be able to offer these types of services to the general public.
In return, they take it off your hands relatively quickly. and you are off to shopping for your next piece of gear or thinning down your collection, whatever the case.
Its also a great service for those who enjoy buying gear from TMR. Ive bought and sold gear to TMR several times, and 95% of the transactions have been seamless. They seem to have a solid business strategy, continue to stay in business, and still growing. Can’t complain about that for an industry that was kinda struggling five years ago. Its also fun to just browse their site once in a while. Enjoy!