I'm a Love (Sex) Machine!

Long ago I stumbled upon sex machines through porn. To my delight I learned that these machines of glory were available to the public, but for a steep price. I'm in college, so I don't have $1000+ to spend on an item like this. My partner and I have searched on Google for less expensive machines but have not had much luck. Are there any sex machines that anyone knows of that are in the $500 and under range?