Check this thread to get started.
buying used check list - Land Rover Repair Forums - LRRForums.com
Thats a pretty fair price, but now a days the price for SUVs are dropping fast...so you could probably get better (especially since this is a premium gas only vehicle...)
Does it have service records? Any gasket changes? Any oil leaking (probably some...but how much? Drops on the driveway, etc). Look for oil around the engine block, drive it hard and see how she heats up. Things to start with. There's lots to look for on a rover purchase, but they can be great trucks if taken care of!