I would try to sell it whole as is for a long time before I scrapped it OR I would put it back into service until it gives up the ghost.
How many rusty bolts do you want to deal with? How long do you have? As stated it takes a long time to part out a vehicle, and then how do you get rid of the frame and bits left over when there are no wheels to move it? It's best to either scrap it which is fast, but less money or sell is as-is which takes a bit more time, but a bit more money. That is unless you have a way of getting rid of it in a couple years when you get tired of seeing it and you sold the axles (or even just wheels) that should be avoided.
I afforded him 3000.00 if he kept crane and form lift. Hadn't heard back so I could check on transportation and a few details. So I think he/she were trolling to buy for themself. Anyway I moved on, just needed motor and rears for a rock crusher set up.