Wow that's crazy cheap... they usually go for $15/ea. Anyhoo... I wouldn't recommend these guys as feeders. They are extremely high in fat and I would be concerned with your snake becoming hooked on these as well. Availability may nto always be there for you, and they do not produce like mice or rats. Typically they are said to produce 1-3 babies every 6 months, and this has been my experience as well with the exception of one pair, which produced 5 litters continuously, with one litter being of 4 babies! Anyways, asides from the cost you can get them for, I can't see any reason you would want to use these little monkeys as feeders
<img src="http://www.ssnakess.com/photopost/data/503/22spinybaby1.jpg">