These can NOT be used for scrypt mining, instead buy a dualminer USB if you are looking for something cheap which mines scrypt.
oh man, you just saved me, I was moments away from submitting the order. Going to look into the one you requested.
If you want to get into script mining I would suggest looking into a Gridseed. I believe
http://zoomhash.com/ has a sale on them right now for $150ish, then use coupon code zoom2 for 7.5% more off.
(I am not affiliated nor do I get any money from zoomhash, they just have good prices).