Not wanting to scupper your sale but I think you should also point out that this is a package and that the drivers are factory set up for those motors, so changing motors will require test equipment not a simple switch setting.

The NEMA23 motors are 1.8Nm static torque and the whole thing is running on a 36v supply. So will possibly suit a small (A4, maybe A3 sized) desktop cnc router running at low to medium feed rates but is more aimed at small table column mills.