Where Can I Find an Affordable, Quiet, and Reversible Gear Motor?

[Mopar_Mudder]

I am looking for somewhere to get a gear motor for a very low budget project, specs as follow:

Voltage = prefer 110v, could be 12 if the price is right
RPM = 15-20
Torque = 100 inlb
Quiet as possible
Reversible

Something else that would be a bonus:
Soft start and stop, gradual start up so it is not an abrupt shock when it kicks in
I have to beable to track the rotation of the motor so I can program various start and stop points. I have another method of doing this but something built into the motor would be far easier.

 

[pantaz]

Many options and many sources out there, depending on what part of the world you are in... http://lmgtfy.com/?q=surplus+gear+motors