Advice on trustworthy audio resellers who check condition, offer trial period?


I'm wondering what resellers you find reputable for your purchasing. I've made three purchases with Tmraudio.com (The Music Room) in Colorado and they've been great. They guarantee their items work, have a 14 day trial period, and an easy to navigate website.

What other sites do you know of like this — not just that connect sellers and buyers, but that take in used gear, test it, rate its cosmetic condition, and offer a trial period? (I'm a bit wary of buying, say, an amplifier of $2k only to find it's not what it's supposed to be.)

This could be a general site, like The Music Room, or just a store that does this (good selection, prices, trustworthy, and trial period). Thoughts?

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Saturday Audio Exchange, Saturday Audio - Chicago audio store with new & used hi-fi equipment for music lovers Music Direct, I recently purchased a Musical Fidelity NuVista Vinyl Phono Preamplifier from them, I tried it in my system and it just didn't sound right so I called them and took it back, no questions asked full refund.

+1 TMR. Could not give them higher marks really. I've purchased 3 major items from them and their customer service is top notch. 
echohifi.com. These guys are in Portland, Oregon and they are great.  Always new great stuff.