I think the PocketBook IQ is what you're looking for. It has the Android operating system and accepts a wide variety of formats. That model just went on sale today in the US for $139.99. You're not going to find a better price for an e-reader with Android anywhere else. There are 2 US locations, Seattle WA and Independence MO. You can also order the device and have it shipped to you. Simply email
christi.gibson@pocketbook-usa.com if you'd like that option.