Hello,

I would like to sell it at $ 320. The ticket is valid for any roundtrip
within U.S.
I will pay the related fees (security fees and etc.). I will make a
reservation for your flight at first but once the reservation made, you can
change your itinerary anytime after.

http://www.southwest.com/rapid_rewards/use_ticketless_award.html
No black out dates.