Have you all seen the bidding on the rear PTO (18094) accessory for the later Large Frames on eBay? It does include an NOS driveshaft, but really!! I may have to start storing mine in the house instead of in the shed!
What in th world would you run with it? Looks like it takes up the entire rear of the tractor ? I could see someone trying to run their hay baler to bale up loose hay with it... NOT...Might work for a tow behind seed caster that is pto driven? But most of those are Cat 1 3 point hitched.... Don't see much use for it , especially for $1500 YoWW.. You can buy an old Ford 8N for that kind of $$.
Theirs a guy not to far from me that has a HT 20 with that rear pto on it . He runs a 60" finish mower on the back. I haven't seen it but he called me wanting to sell the complete set up for 1600. I was told by other lookers that the tins were rough/ratty. Tractor over all was in fair condition. I wasn't interested so I didn't pursue it.