they feed on microfauna, which counter acts the purpose of a DSB. you keep a DSB to house microfauna, the star comes in and basically "empties" your sand bed, making it inert.
they may keep shallow sand beds clean, but more than likely a SSB wont provide enough food for the star and it will slowly starve.
anyway, we normally have them at suffolk county fish and reef if your out this way, James. but for the price, go with yeahcheetahs.