W: March expiring UA CR1 H: Avis free day + SW drink certs I have a P.S. flight on UA end of March. I'm looking for an expiring CR1 to upgrade to business. Besides Karma, I have: 7 SouthWest drink certs expiring December 31, 2012. 1 Avis free day cert that expires April 30, 2012. If interested, let me know. Thanks.