the next one just got listed. 37k miles, two owner car https://bringatrailer.com/listing/2006-mini-gp-21/
one on craigslist in CA: https://slo.craigslist.org/cto/d/san-luis-obispo-mini-cooper-jcw-gp-2006/6967391332.html
Even at 15K $$$ this one would need lots of TLC to bring to a mechanical standard I could live with. 126000, yes a bit high, but you could track it with a pretty clear level of no guilt.
and I am going to feed you a constant diet of GPs - next one is up. 47k from South Dakota. Looks clean https://bringatrailer.com/listing/2006-mini-gp-13/
It also has an Alta intake pipe (likely not the worst thing you can buy from them) Stoptech brakes, nicer wheels, lots of goodies. I can't afford this one.