You're really not gonna find what you are looking for in that price range unless you build it. You could probably find yourself a pretty decent tripod for like 150 and then build some sort of dolly. Another option is to get yourself a tripod and also something like an Eazy dolly (www.eazydolly.com
) They are kind of on the expensive side but so is all video equipment.
Look It Up...Order your copy now.