I wouldn't touch a jetcat engine out of warranty. My p100 had a compressor failure 10 months out of warranty with a mere 15 hrs on the clock. Jetcat wanted the cost of a second hand engine to rebuild the engine.(approximately 1000 euros so 1200 usd)
I'm not sure if a warranty would be transferable to a new owner anyway, something I'd want to check, and I'd read the fine print of what warranty would be provided if you do get a bearing change or a service.