"nonrunner" being a RELATIVE term.
There are rolling basket cases that are "nonrunners", that would require overhauling the engine and rebuilding most of the rest of the bike with new wear parts.
There are, on the other hand, stored bikes that are "nonrunners" with virtually zero miles and could easily run with minor "freshening up" of any perished rubber bits, a proper flushing of some residual lubricants, and a fresh battery that would then be worth the high end (or more) of that particular model's price range.
...and, of course, there is everything in between when it comes to "nonrunners"...