I somewhat agree. That truck selling isn't the problem though, the problem is how it afects the ones sold after.
Cornpop is going to see that a 1990 Ranger just sold for almost $30k. He's going to proceed to ignore the fact that truck had all this work done to it, and is going to decide that he can list the one that's been sitting under a pine tree in his back yard for the last 10 years for 15k. DLBMB, IKWIG.
That in itself wouldn't be a problem either, the market will tell him how stupid he's being and it will never sell. Right? Nope, someone will eventually pay him 10k for it, because they think they can turn around and drop 10k into a "restoration". Then put it in an auction for 35-40k given that it is low mileage with only 5k miles on the odometer, and use this truck as basis for evaluation. Then some idiot will run the bidding up to 50k because they have more money (or credit) than sense. The cycle repeats.
It's a vicious cycle that makes classics unaffordable for everyone. It sucks. My 68 Ford could really stand to have a full donor body due to rust. Can't afford to buy a full donor because of all the auctions running values up so high. People sitting at home that bought the truck 20+ years ago for $500 to use as a beater, now want 10k because they're selling for 50-100k (or more) at auction. Bro, truck isn't running and has barely any usable parts beyond the sheetmetal. Nope, they're going to keep doing it and eventually the only older vehicles like this that will be left will be sitting in overvalued "collections" somewhere.
FWIW I wouldn't sell my 68 for what I think it's worth either. As a running driving example I've got it valued at 5k for insurance purposes. Due to sentimental reasons I wouldn't sell it for 10k, or 100k. It'd probably take a few hundred thousand for someone to purchase it from me in curent (rust bucket) condition, and even that would wouldn't be an easy sell. However if I saw where I couldn't keep it, I'd let it go to the right family members for little or nothing, possibly even giving it to them. IMO, someone that's valuing it high for sentimental reasons it's going to be sending it across an auction block.
I'll get off my soapbox now.