Radisson paper cert
current price: 25K for 1 night in US or 40K for OUS.
Just wondering if there's any blackout dates or other restrictions. F9 website didn't say anything about that on the National rental certs, and I only found out after redeeming that there are blackout dates (and not being able to use them for the intended trip).
I do hate paper certs though. Lose it and you're screwed.