Greg, how are you preparing your coffee? Drip, Press, etc...?
Typically you will want a burr grinder, what is "Cheap" to you?
You can snag many different burr grinders for around $50 but to get a really good one you will need to spend a bit more.
This Baratza has good reviews for regular coffee, you might want better for espresso though.
This is cheap IMHO in the world of good coffee grinders $129.00 @
SeattleCoffee
If you are just pressing your coffee you can use almost any grinder with decent results although it is best with a consistent coarse grind.