The Cicare simulator,
http://www.helis.com/timeline/cicare.php
Look at the SVH-3
which is a rotax powered heli held within a "frame" is very nice for giving the beginning student feel for the controls, etc. (The 22 is much more responsive, but you still get a good working knowledge of control relationships without the chance of killing yourself and bending metal)
I used it myself in my advanced stages of commercial prep just to do "stuck pedal" situations, whirling around madly without fear, which then, after letting me experience its yaw rate in a full power tail rotor loss, let me concentrate on recovery procedures, and how one can manage throttle in said situations, etc.
Then there is the fly - it sims which as pointed out, are good for inst training without incurring the cost of the heli itself.
I am also a strong advocate of "chair flying" (but NOT armchair logging of time
) sitting either in the cockpit or out of it and imagining where you are and what you are doing can also work for a student of any type.