Videomaker – Learn video production and editing, camera reviews › Forums › Technique › Miscellaneous Techniques › Need help picking a video camera › Hi AndyYour budget of $400
Your budget of $400 is quite a constraint. You could find good used camcorders, such as the Canon HV30, for that price. Problems with chroma key is usually due to either the screen and/or the lighting rather than your camcorder.
Enjoy looking for a new camera, it is always fun.