Electric motor

I would suggest you try surplus electronics vendors if you are going to hit that price. Of course it would also help if you have some more specifications in mind for the size of the motor, diameter of the shaft, keyed shaft, current draw, etc. Otherwise you're just bodging. But it would make a good project if they ever bring back "Junkyard Wars."

Motor Size:

about 110mm long (minus shaft)

1/4" Shaft

Preferably not Keyed

Try Burden Sales http://www.surpluscenter.com/home.asp?UID=2008071515332523

They are a surplus supply house. They have all kinds of stuff Electrical, hydraulic almost anything you can think of.

Good luck.