Welcome to FlyerTalk! Hopefully you find us helpful enough and stick around and enjoy your time on here. If you have any questions, don't hesitate to ask or send me a Private Message (click on my handle & it's an option). I merged your post into this thread as we keep the discount discussions here.

Regarding your coupon code: most $ off coupons are only valid up-to full size. If you don't need premium, you might be better off booking full size & then using a coupon to upgrade to premium. The upgrades don't always come through, but it comes down to how much you'd be willing to cough up for being guaranteed the premium.

As for coupons, Avis has a running bunch here: http://www.avis.com/car-rental/conte...navId=T3M00S00

Or the good old fashioned Google search might get something that fits for you.

Another caution: watch out for under-age fees with Avis. Since you're <25, you'll get hit for the fee unless you've found an AWD that drops this fee. But you can only use one AWD.. you can't have the best of both worlds.