Looking at a 2014 1k need advice

Need some help.

Found a super clean 2014 rzr 1k. 37 hours 200 miles.Has most of the accessories I would want to add and seems to be priced right 15k. Only problem is the motor has been rebuilt. How leery should I be here before proceeding? Anything to look for specifically? Also how much depreciation should I apply due to the motor. Any advice is appreciated.

CJ