It’s worth more because it’s a 4WD short bed, and they are hard to find. However, it’s in really dirty shape , and many folks can’t see past the dirt and the small broken parts (inside doors pull, dash bezel, etc.).
It would take 4-5 days to do a full cleaning, and then you have to find the broken parts. And until you get into the mechanical evaluation there is a risk you will find a major problem. Even a simple carburetor, water pump, etc. replacement adds up quickly. All those factors have to be considered in your offer, since that elbow grease and parts search/replacement is all on you.
If it can be started up and run up to operating temp, then I’d probably go as high as $2k, and maybe more if it runs around the block and shifts properly. If it cannot be run and driven then it’s just a rolling chassis with a completely unknown drivetrain. Are you ready to put $1-3k to replace/repair an engine or transmission just to get it operational?
This is the time to be a pessimist, not an optimist when you estimate how much work it will take. “Running before parked and disabled” is not a useful status from a woman who knows nothing about the real mechanicals. Does it also have a Corvette 350?