This is more like the prices I'm used to seeing around here:
While I think this is crazy money for a rough old machine, the plow alone would sell for $300 here. I just sold one of my spares for $300 to a guy who came out to look at a rolling WH chassis. He bought the AC blade to make it work on the $350 rolling Wheel Horse chassis he bought off me. I listed the WH over the summer for $200 and got two hundred emails, so I killed the ad, sat on it and relisted it last week for $400 OBO and sold it to the first guy who showed up.
By the time he left he bought a B series wheel horse, the AC plow blade, two Cub Cadet rear wheel weights for $150, and a set of used skinny Duro True Power ags for $150.
When I sold my B1 I had 20 emails in an hour on it, the first guy who showed up bought it.
If the OP isn't interested in that tractor, I am, I can double my money on it pretty quick.
That machine will bring good money in pieces too, every had to buy a specific BGB or transaxle?
While most of use would most certainly just go find a donor machine for cheap, the average owner calls the dealer or goes online looking for the part he needs and breaks out the credit card. I had a guy bugging me to sell the spare seat off a parts B110 I had, not wanting to part out a complete machine I ignored the offer, he finally showed up one day with $200 cash and kept insisting he buy the seat. I offered him the whole machine for $500, but he just wanted the seat. When I said I wasn't parting it out he upped the offer to $300. He left with the seat. A month later he came back wanting the deck which I sold for $200, and another $40 for the front rims, he then came back last spring and bought the front axle assembly and spindles for $100. I'm not sure where he's from, but his truck has PA tags. Apparently he's restoring one and the parts on mine are better than those on his. I hated to part out a complete machine that most likely only needed a carb cleaning and points but it came with two other B110's I have as a second parts machine, all three were complete but this one is well rusted and weathered.
From the prices I keep hearing here it makes me want to rent a truck and head west and grab up a bunch of these things.
For some reason, even though no one seems to know who the dealer was for AC here, there's a load of B1 machines here, and they never sell cheap.
Finding one that's not all salt eaten is another story, most people keep them outdoors and after 50+ years in the weather, one that's not serverely compromised by rust is rare. One that's not just plain worn out is rarer.