Had to book a ticket to Monterrey (MTY) for next weekend for a weeks stay. Had my corporate travel agent do their standard booking process in standard coach as usual -- happened to be a "H" fare outbound and a measly "S" on the way back. Since my corp travel agent can't get the exit rows or good seats, after it was ticketed went over to CO account to get better seats. Then I saw "Upgrade to First Class for as low as $26" -- I thought this was a mistake but lo and behold the "Z" fare on the outbound was only 26.14 higher than the "H" coach fare. As any smart FF would do -- I snapped that up, now I have a Z fare on the outbound with 150% for a whole 26.00 out of my own pocket -- definitely worth it than having to be in the EUA pool.