From one Tennessean to another welcome to Tractor Forum paver4us!
The Leyland 344 is not a very widely known or in very large numbers in the USA. This tractor was built from 1969 to 1972. It was built during a cross over from Nuffield to Leyland when Leyland bought out Nuffield tractor. A four year production is not a good omen. My concern would be finding spare parts.
It was built in Bathgate Scotland here in the UK from 1970 to 1972. It has a Leyland/BMC four cylinder 55hp diesel engine. Pretty much a very basic no frills tractor.
If the tractor, hydraulics, and tires are in good shape $3000 is doesn't sound unreasonable. A green, blue, or orange 50 hp diesel tractor of similar age and equipment would cost considerably more.
If possible, it would be wise to test run the tractor for at least a half hour operating the hydraulics and pto under load to expose any potential problems such as leaks, weak/slipping clutch, or problems with the trans or engine.
You never know, this just might be a diamond in the rough and be perfect for your needs at a very reasonable price. Just factor in the above details first.
Be sure and let us know how things go.