
Guide dog for the blind do this cross often. It should be fine, but I would want to know that both parents were hip scored (with a score below about 20) and eye tested.
Whether it is a fair price for a crossbreed, well if you think it is.
If it is a baby pup that has been really well reared with no expense spared, then it will have cost the breeder around a £1000 to rear this one off litter, even without a Stud fee to pay out.