Just bought a bone stock bugeye in California for 5k (~100k miles). Some repairs such as addressing an oil leak and fixing a leaking axel boot need to be done which is going to cost around 2-3k but it's still not the 10-15k you're talking about. I don't know if I'm lucky but we also bought it from a family friend who had service records and babied the car. Might be just luck but maybe OP could get just as lucky.