Our Son found a left over 2019 f250 with a $70K window sticker. Dealer wants $64K. I haven't even looked at a Ford since 1990 so don't know where it should be.
..or the OP could simply decide what the pickup is worth to him, and I'd suggest new pickups (whether Ford, Dodge, or Chevy) are vast improvements over prior generations, and offer that number for the vehicle.
If they take it, great. If they don't, then they want more for it than it's worth to the OP.