Some of that stuff will not be scrapped under any circumstances. There's some serious $$$$$ there for a lot of those items. Even if a scrapper bought it all by weight he'd be stupid to not find a retail buyer for a lot of it. Odds are good that will eventually be a REALLY good auction. Dude had an appreciation for steam, for sure. I've walked through my share of iron with large trees growing through it but never anything that size or with all the steam powered stuff or the HUGE fricken engines. How the hell would you even move some of that?
If you get the chance, go to a local threshing bee or old time/steam reunion or similar. It's really neat to see someone walk into a shed, go through the start process, and drive a 2 story tall tractor out and hook it to something. There's a local one to me where they run an old sawmill with belt drive off a steam engine and show the entire threshing process. It's becoming a lost art since the younger generations haven't really picked up on it.
On the steam engines, if the boiler will pass an inspection, it will run again. If not it may be parted out to keep another running unless it's a really rare model. Boiler repair is brutal. And if it's not right it can kill you (or whoever may be near it).
It was worth scrolling through, thanks for posting it. More proof that good stuff can still be found in peoples yards.