Maybe I'm the guy here I dunno:
One time I drove 5 hours to pick up an amp that was $1000 dollars, I decided to buy it, plunked down the cash and somehow I was short a $20 dollar bill, it was on a Sunday, there were no banks open and I had hit the ATM limit for the day, I scrounged around my car and came up with $13, so I was $7 short, and the guy wouldn't budge, he wouldn't let me have the amp $-7. Guys house was huge. I offered to paypal him the 7 bucks right there, leave collateral that he could ship back and I would pay the shipping, I offered to give him a Boss SD1 that happened to be in the car on top of it. Nope. He knew how far I drove. Recounted the money for like the 7th time and it was all there and I bough the amp, I'm pretty sure I didn't even haggle him down on his CL asking price either. I think the guy was a fucking dipshit but idk

Maybe he just had multiple interactions with people trying to stiff on an agreed on price during the sale (IE "Ill tell you what, I have 500 dollars in my pocket" [when you agreed in the emails to $650 prior]...FUCK AMERICAN PICKERS, STORAGE WARS AND FUCK PAWNSTARS FOR THIS SHIT)..I have that happen pretty much every time now and it's grown to piss me off. On the flip side I did have a guy pay me the final $5 of a $600 Telecaster in basically pennies which was annoying...I would have let him have it if he didn't have the coins on him though.
One time I sold a Box of Rock to the infamous Mason of Vertex pedals. I met him downtown in San Francisco on Market Street, there were no places to park of course so I hopped in his pickup and he drove around whilst checking it out, took him like 2 minutes to decide to buy it but then proceeded to drive around for like the next 25 minutes talking my ear off and I basically couldn't escape out of his pickup until I piped up and told him I needed to go, it was mega awkward. He seemed like a nice guy though.
One time I bought a Sequential Six Trak and the guy failed to tell me it didn't work at all. That was one of my first forays into music gear and CL though, eventually figured out how to repair it with replacing some burnt out chip and caps or some bullshit...you'd figure information like that would be pretty crucial though.
10 years agoI had a guy show up to play some weird synth pedal I bought and proceed to dick around with it for 40 minutes and then decide not to buy it, I only remember that interaction though because I have never seen that pedal again and forget what it was, and it's been bugging me for years trying to find another. I think I bought it from PGS, it was a octave/synth pedal called a Black Hole or something like that, I've never been able to find it online though. It was very similar to the EQD data corrupter and looked similar (white and black with a big knob near the middle, but was a 1590DD) but it definitely wasn't one, I think it came out way before the Data Corrupter.