I used a cheap ($15) Wargin Spice/Coffee Mill blade grinder for years to make drip coffee through a paper cone Mellitta and it was fine. If you get into making French Press or vac pot coffee the cheap grinder may not yield a fine enough grind. best bet for the money is a Zassenhaus manual mill grinder if you don't mind a minor amount of effort.
The Maestro and Maestro Plus are good grinders for moderate use. If you start grinding a couple pounds per week or getting into serious espresso with a higher end espresso machine you can and will see the difference in grind quality and espresso quality.