Any clippers will do the job. I have Wahl clippers from Walmart. They are aboaut $30. Great for trimming the beard and such, and for clippering the head down to next to nothing. Easy to do yourself. Take the guard off and go for it.
It will give you a good idea of what a shaved head will look like. Actually, this is the first step in shaving your head. Clipper it down to zero, then break out the razor and finish to a smooth dome.
The difference in look from a shaved head and clippered to zero is nearly identical. The big difference is in the feel.