Ouch...for that kind of price you would be much better off with a Nature Spirits


http://www.nsreptiles.com/

The one you posted is pry only going to get you one clutch and you can't seperate them by snake (all the eggs go in the same area). It has a nice feature but IMHO is too small, too expensive and not helpful for Ball eggs.

If I had $400-$500 to spend I would get one from the above link or better yet buy a wine cooler and build my own.