Here are two Fracmo brand motors from a who-knows-what brand wheelchair (they haven't been used on a real wheelchair for years.) I replaced the brushes and oiled them when I got them and they have only seen light use since then. As you can see, I mounted them on a wooden platform and attached batteries for driving around my neighborhood and carrying objects - the motors work great. The gearboxes are in great condition and power transmission works very smoothly. Anti-tippers are included but the anti-tip wheels might need to be replaced if you plan to use these safely. Currently the wheels have new 12.5 x 2.25 tires mounted, but they are definitely not standard power wheelchair tires (I think they are from a kid's bike) - however they are new with full tread and the tubes hold air. The brakes have been removed from the motors so don't ask for them.
These motors have a lot of torque and it was very easy to do a wheelie in this vehicle with a properly configured controller. Make your own fun chair or remote controlled lawnmower. NOTE: You do not get the wooden platform or the caster wheels in the picture. It would not be very useful and cost too much to ship. As it is shipping is expensive because the motors are very heavy.
Here are some more pictures. THE 2003 DATE IS BECAUSE THE CAMERA TIME IS WRONG. THE PICTURES WERE TAKEN TODAY.
Crazy person on a makeshift chair using these motors:
