About 10 years ago I walked into a local music shop that does mainly consignments and used gear. They had a 1984 Marshall 2203 head...a little beaten up and missing a knob or two, marked at $360 on consignment. It worked perfectly. I carried it up to the register and started checking out. As the transaction was nearing completion, the owner of the shop came back from lunch, looked at what I was paying and just said "If I'd have been here when that came in, I'd have given the seller the $300 and set it on the floor for $600. You're lucky I wasn't here."
I took it home, cleaned it up, replaced the knobs, kept it for a year, and took it back to the same shop and put in on consignment for $800. It sold within a week.
I've bought and sold quite a few things from that shop.
Way back in 88, my band mates and I pooled our resources together in order to make a one time, huge gear purchase at GC for as many of our wishlist items we could get. We took two pick up trucks and the five of us walked in an hour before closing time and grabbed the GM. We told him we had a set dollar amount, and a list, and we went to work going through the store, gathering the items, and piling them up near the register. That process took us beyond closing time.
Once everything was in the pile, the GM totalled it up, and it was way over our budget. So the haggling began (he totalled everything at full retail). After about 20 minutes of haggling, we reached a wall. We were about $800 short of the target. So with great sadness, started removing the least necessary items from the list until we got to the magic number.
The money changed hands, it was now more than an hour after closing, and everyone just wanted to go home. So the GM and a couple of employees helped us load everything into the trucks and we took it all back to home base.
The next day, while setting things up, it suddenly dawned on me that the items removed from the list, we're never removed from the pile... so here we had like 12 or so items we didn't pay for.
I called the GM and told him that in all of the rush to get out of the store, nobody got around to separating out the stuff we weren't getting. I expected him to ask us to bring those items back.
Instead, he asked for a list of the items and my address so he could generate a new receipt that was properly itemized for warranty and inventory purposes, and he would mail me a copy so we wouldn't have to drive back down there.
Yup. True story.
But, that was the GC of old. Those days are ancient history.