"the 3ph control lever is not turning the shaft and operating the hydraulics"
Are you talking about the touch control handle?
Like, you can raise the handle but the lift arms don't raise?
Elaborate on that for us.
As to value?
It's always hard to say.
You say tires are useable as is.
How is the tin and paint?
Any remote valves?
PTO spins properly?
Drawbar is there?
I assume it is manual steering?
Tie rods are cheap. Probably buy all 4 for a C note.
I would price an average 3000 from about $3000 to $5000+ for one in excellent condition.
Lift not working would certainly knock some off that. It's rare here to see one in any condition for under $2500.
Photos would help.
3000 is a very good tractor. Not hard to work on, good parts availability and generally familiar if you've had an N before.