Fuel for 8 bucks

I fly cp 30% through my freya at $24 buck a gallon and byron 15% in my planes at $17 a gallon. That all they carry at my LHS.
Thats what I have heard about those planes.... I want something that is goooood quality and will last a long time. I took a look at the DP extra 330...It looks nice...They don't recomend gas engines though. I am still considering it! I also checked out the Aero works 25% edge....It price is higher but does that reflect the quality? I like both of these models... Any impute is apriciated.
Thanks
Chad