Vegas coupons

[SamIAm]

I'm going to Vegas in August with a bunch of EV fans (read: cheap-bastards), who all get a kick out of free drinks/gambling/etc. For instance, we'd never play craps normally (Minus EV!) but we'll happily walk all the way to the Tropicana for the $5 match coupon.

My question is: Are all of the coupon books for sale online total rip-offs? I don't want to pay $25 for coupons that are printable elsewhere. I know about stopping at the individual casinos to see what they offer, but what about these collections of all-vegas coupons?

I found one empty thread on coupon books in vegas, but there's gotta be more.

Anybody have any experience with these? Thanks for your help.
-Sam