I'm sure there are plenty of expired Express Play Coupons floating out there.
You just need to get to them before they're thrown out.

A new sub-section of collecting "TITO", get an Express Play Coupon from each Harrahs before they change their name to Caesars Entertainment. (Yike's that's all we need, more stuff!)

I have these from Rincon in San Diego if anyone want to trade for a different Harrahs location.