I find the idea that Tesla bought the first few crashed Model Ses plausible.As was the case with the first few Model S salvage auctions, this one for a 3 is likely to go for some outrageous amount. There was speculation that Tesla themselves bought the first few Model S that went to auction, although can't confirm that. It wouldn't surprise me if this Model 3 auction went for $40k or more.
A couple of decades ago I was in the Canadian army, posted to Germany. Our company spent a week on exercise with one of our sister regiments in the UK army. It was their first exercise with the then brand new Warrior Infantry Fighting Vehicle. Two of them were involved in a collision. They packed them onto flatbeds to ship them back to Britain, as it was the first real-world crash, and they wanted to study how they faired in the real world as opposed to crash tests.