As long as there is a decent service history milage shouldn't matter, most owners are enthusiasts and look after their babies,
I've had some sort of scoob tucked up in the garage since 95 & my present RA with 90,000 mls on the clock runs as well as my GB with 11,000 mls, both running on prolong lubricants, as long as the Japs are oiled & watered regularly they don't let you down,
it's a buyers market and theres some lovely examples out there I'm sure there are plenty of guys on here would be only to glad to help you choose, but there are some dogs as well.