How much for 2000 4x4 ac 150k miles (Help)

I would wait for another imo. There's plenty of trucks out there that will be for sale eventually.
150k isn't a ton of miles, but as everyone said a good frame is great, but don't be deluded that there's no other work to be done or coming up.
I bought mine (quite beaten) for 4k, the PO put in almost 2k before selling it to me, and then I had to put in another ~2k after buying it for more neglected maintenance.

All to say, that's prolly a great truck and priced for it, but if you have patience I'm sure something cheaper will come along.
The better trucks always come across FB Marketplace right after you buy something.