I found a nice list here.
This is a great resource if you're looking for a used E85 compatible vehicle, because it shows what to look for in the VIN number. You can go to cars.com and look at VIN numbers to find the E85 cars.
I know that SUV values are dropping like a rock, but there's an E85 compatible Explorer and Moutaineer. You could get into one of those for $15k and run straight E85 with no worries. Of course, combined mileage on E85 is 11 mog, down from 15.
Another good choice is the Ford Taurus. They're dirt cheap. I found an '01 Taurus flex fuel for $6000 on cars.com. Look for the 8th digit in the VIN to be "2". They sold flex fuel Tauruses 'til '05.
Nobody is advertising these cars as flex fuel. Chances are the dealers don't know the difference. Go in there and steal one!