Let's start with the obvious- that vehicle was made almost 45 years ago. Any vehicle of that vintage that hasn't had either meticulous maintenance or a restoration of some sort performed is going to need work. There were between 1500-2000 of them made between '68 and '72, for use by the British military and about other 20 countries. They aren't exactly a dime-a-dozen in the States. If the steel body parts, aluminum body panels, and frame are in decent shape, you should be able to source the majority of what you need to keep it running smoothly and safely from US and UK vendors. It won't be cheap, though. The little parts are what kills you, although the big parts have come close with me.
Unless it's a model designed for arctic use, expect the heater to be anemic at best. Top speed is pretty much dependent on the engine condition, but don't expect more than 50MPH. Brakes were designed to stop the vehicle at circa-1965 speeds. The steering is manual. Learn to double-clutch, because I don't think 1st or 2nd are synchro. Gas mileage varies by use, but don't expect economy out of an engine design that dates back to the late '50s. Steel has a shelf life, especially unpainted/untreated steel in harsh climates, and steel and aluminum in close proximity leads to galvanic corrosion. If it's not leaking oil, chances are it's empty. Reliability is completely dependent on your skills as a maintainer.
Like I said, talk to aka rover. He will have some good advice for you, and if you're interested he might be able to find the Rover you're looking for (he's been known to have one or two sitting around). If you're dead-set on a Lightweight, this might be your only chance in the Anchorage area. That said, I found out the hard way that a tempting price on a Land Rover usually foreshadows years of pain and heartache. Go in eyes wide open.
Old Rovers are the coolest things out there, but they're not for everyone.