POS service since it was sold - do some research - wouldn't even consider buying a new one or used. Its like your buying a plane that has no service behind it.
How exactly do they not go well together? If your prop is getting hit by gravel it means you either had a prop strike that would destroy any prop no matter the surface or you're way too close to another taxiing aircraft which isn't likely since on a gravel runway you're likely the only operating aircraft.