Yes, cashiers check in hand, then you fly it, comes back in same condition, no worries just but dinner for the rental.

That sounds rare, but ideal, with care in the details.

Seller holds the check with the understanding of a china shop buy it if you break it rule.

Seller's insurance company has signed off on covering the buyer flying the seller's plane. Plane is in annual. Buyer is legal to fly.

Buyer is comfortable that the plane is ok to fly. (I've not yet bought and flown a glider without the luxury of time to go over it and address some safety of flight issues. Still, given the right circumstances...)

Good luck with your search.