Groupon: $20 For A $40 Avis Voucher -Expires Dec 31, 2011 -Limit 1 per rental car -Valid only in Canada and United States (excluding Alaska) -Minimum 2-day rental Groupon Getaway Booking Guarantee: If you aren’t able to book the stay you want after purchasing, we’ll give you a refund. The Groupon Promise: If you’re let [...]