Unfortunately, you're going to have to pay more than $100 for a good one with dual zones and around that capacity. Even if you buy 2 single units or a good dual-zone one, you're looking at least $300-400.
This is very similar to one my father had. It worked well until he got rid of it for a bigger one.
http://www.amazon.com/Whynter-WC-211...5677490&sr=1-2