If you've got a ride and some free time get on your grind man. Get some business cards, burn some demos, tell everyone you meet about your beats. You never know who might know somebody who knows somebody. I've had my best luck at underground shows and giving stacks of my business cards to studios. I've sold a few beats through this one studio that just does recording/mixing and mastering. People are always asking the owner if he makes beats and he just hands them my card and whatever demos he has at the time. Also, if you dont get a potential customer the first time try to keep in touch with them.