I've put all the missed eBay deals in the past. I can't recall any now put I've had my share.
The only example I can think of was a pickup truck. My then boss had a 1983 (or 81?) Chevy 1/2 truck he kept to make runs to the dump and such. He also had multiple other vehicles both new and old, and had the means to take exceptional care of them all. He decided he wanted a newer Silverado the same generation as his daily driver Suburban, and in the same maroon color. So he got it. I always drooled over the sound of the 454 under the hood of the old truck. The day he rolled up in the new one, I asked about the old one. $500 he said. Not bad, it was a regular cab with an 8' bed and two wheel drive. Very nice shape with only minor dings, no rust. Rare in salty Maine. I already had a truck, a lifted 1977 4x4 F-150, plus a car. My Mom would have had something to say if I came home in vehicle number three... It was the beginning of the shift and I was literally about to go across the street to the bank to take the money form my account. A coworker showed up and heard what was going on and begged to be able to buy it instead. She had a horse and only one vehicle (an Explorer) that she had to fill the back of with hay. (Then spend time cleaning out all the loose bits left over.) She needed it more than I. And she wasn't getting a better deal anywhere.
I decided she could buy it. She was greatly happy and used it for quite a few years before selling it for $1000, twice what she paid. I wish she had given me the first right of refusal. Given the gas milage my F-150's 351 got, I hate to think about how that Chevy's 454 would have guzzled gas...
Still, I kinda wish I had that truck. I would have liked keeping that one for a long time. Oh well. That's the only tale I can think of.