Good to hear the positive comments for Reverb. I had a similar experience as Vintage Old School. Sold over 16,000 items on eBay, though I only received feedback for half and maintained a 100% seller rating from day 1. Had a buyer with sketchy reviews bid (I usually canceled them) before the item closed. The second the buyer received the item, they started to demand a full refund making up all kinds of BS about misrepresentation, add alterations and other outlandish accusations. Thought eBay would take my side, given my and the buyer's history, but far from it. They took the buyer's side, refunded the payment, changed me the selling fees, then when I pitched a fit about it, they closed my account. I got my account reopened eventually, but I'll be damned, if I give them 1 more penny of business if I have any other options. I never got to experience getting screwed as buyer. I just stopped dealing with them unless it's something I just can't find any place else.
I've been dealing with the flakes on CL, and taking my chances with the grossly misrepresented items from GC's used inventory. I've learned eBay's guarantees only guarantee them bigger dollars. We have no rights, no one to talk to and certainly no one who actually gives a damn when there's an issue. If Reverb does better, and it sounds as though they do, then they can have my business the next time I need to sell or buy something.