Used 600rr Buyers Guide

New to this thread and even newer to motorcycles. I bought my first bike ~2 months ago and ready to upgrade. I have decided on the 600RR. I don't have a particular year in mind, locally there's a couple ranging from 08-16.

My main question is for the older bikes. From what I've gathered online and in this thread, these bikes can run until the sun burns out. However, is there a mileage cap you guys would recommend for purchasing used? There is an 08 for sale locally with 30k on the dash and a couple others in the 08-11 range with 20k+.

With that mileage, what should I be looking for that isn't the basics? What should be the price range for those years/miles?