What was the craziest location that you made an audio purchase from?

Found a Western Electric 555 tweeter, 20 feet up, after climbing a wall of open shelving in a storage shed. I was 'pickin'. The guy had (noshit) 300 vintage (20's-30's) movie projectors, maybe 60 Short wave/CB High end military units, thousands of vacuum tubes (of which I knew nothing at the time), etc. 8,000 square feet of cool stuff. Nearly died, but only paid $10 for the 555.

Sold it to a major collector who flew from Korea to buy it for 4K

Bought 7K worth of nice equipment at a Neighborhood garage sale...for $180 cash.

Lady had just left her husband and was getting back at him. I paid her, left them there for a while, and checked out other houses. By the time I got back, there were 5 guys, drooling at the stuff, "Are you the guy who bought these?" "Do you know what you have?". Then the offers started to roll in. I'm not desperate for money, so I just smiled and shook my head. They even helped me carry the M&K dual 12" subwoofer and the B&W speakers to my car. What nice guys :)

Agreed to buy an amp from a guy from another state. He would take mine and some money. The problem was that are states have strong border controls, but the state between our states not so. So, I drived 10 hours in one direction, met the guy,we exchanged our gear at the parking lot, had a drink with him and went back home. The amp he brought (ss) was all wrapped up (as original box would be easy to spot at the border), so I have put it in the car without looking whats inside. Two border crossing later, that I have passed with cool face, brought the package home.At the end, it was the bespoke amp inside and its in my living room since than  

I traded the shirt off my back once for a record at a stereo store.

I was doing hot fuel testing at an automotive proving grounds in Arizona. This was around 1993. I worked all day at the proving grounds in my golf shirt with the Ford and Bosch logos embroidered on it. I was taking the Red Eye back to Detroit that night out of Las Vegas. With some time to kill that evening I browsed around a stereo shop that I found in town. Got to see some Apogees in person for the first time there. The store owner mentioned he liked my shirt because he sold Blaupunkt radios (Bosch) and he was a Ford guy. I spotted a Mobile Fidelity recording of Alan Parsons Tales of Mystery and Imagination in his rack ($21 back then) and I offered to trade my shirt for that record. He gladly accepted so I went to my car, grabbed a clean shirt out of my luggage and gave him my dirty sweaty shirt for that record. Just played that record again last night. I’m guessing the record has easily outlasted the shirt.

Circa 1974, when in high school, I was putting together my first good stereo system.  In those days, the classified ads in the back of the stereo magazines were full of audio wholesalers, with "low, low, prices!"  So, I drove from Pennsylvania to northern New Jersey to buy my first receiver and turntable from one of these wholesalers.  The store was in a seedy section of town, full of old run-down warehouses and abandoned storefronts.  I found a parking spot about a block away and ran to the store (since I had a pocket full of cash). When I got to the store, the tiny windows were protected by steel bars, and the front door was armored.  I rang the bell, and a slot in the door opened and I was greeted with a pair of eyeballs that let me in.  Once inside, the guy asked me where I parked my car.  When I told him, he joked "I hope it's still there when you leave!"  I handed over my cash, got my equipment, and ran back to my car and drove away as fast as I could.