Something to consider is that these public auctions are often influenced by buyers wanting to eliminate the competition. An ounce of dirty motor oil dumped into the radiator eliminates a lot of competitive bidding on that vehicle. It's pretty common for people to skuttle vehicles so they sell for less, but that doesn't exactly fit with this sale.
I've seen 7 cab drivers from Seattle come all the way to Salem Oregon to buy a nasty looking old worn out Crown Vic that has no real apparent value. Of course they wouldn't talk, and after the sale I never saw them again. When a broken down crappy car sells for $5k or $6k, something is going on. I've never been interested enough to bid against that type of group, but it makes you wonder. Are those seven cab drivers in Barbados now?