[750hp]

Hi Mike
The shop selling the motor is very well known for performance Coyote motors, not to mention their V8 Supercar engine program. If they say the motor is in new condition, they'd be good to their word. I think they aren't spending a lot of time answering your questions because they probably just threw the advert on their Facebook page as a favour to their customer.
Coyote motors are lasting well when converting them from n/a to blown, as long as you build a safe tune into them you'll be fine.
It's a very good price for a Coyote. They can be made to look much nicer than the LSA motors too. I'm sure you've seen the billet rocker covers that this shop make. Very cool!