I do not recommend the Azpen A700, it's the cheapest on the market as far as I know, clocking in at (when i purchased mine) $20. But then again, that price takes probably says enough about its quality.
I'm wondering if there is any way to give bluetooth capabilities to something (specifically a tablet) that did not have the ability natively. The tablet in question is a cheap-as-dirt Azpen A700, it does have a micro sd card slot if that makes any difference.