I have for sale a 1970 QA 50 that is in very good use-able condition.  It has a new NOS Honda Piston, NOS Honda Rings, rebuilt carburetor, Fresh seals on the case, and is complete (with the exception of the air cleaner).   This QA 50 retains its original fenders and exhaust.  It was put together to be ridden, so it is far from perfect, although it looks great from 10 feet away.  The paint and fenders should be refinished if a restored show bike is what  you are after.  It does NOT have the common transmission pop out issue that is so common on these little bikes (was repaired in the early 1990s).  Overall this is a great bike for someone that wants something unique and has the property to use it.  It comes with many spares including 2 brand new tires which are no longer available.  
The following parts are included with the QA50; parts carb, center case gasket, generator seal, spare coil, two spare axles, 1 complete wheel with a good tire and tube, 1 incomplete wheel (they are two pieces and the outer was beyond repair), 1 spare used tube, and the original throttle set up.