I started out with about three of these. They are now on a back shelf somewhere.
These X10 wireless cameras produce a very low quality picture, and the range they advertise is streaching it a lot! They are also very susceptible to alot of interference.. ie, Microwave ovens, cordless phones, and just about anything else you use in your home.
Unless you "have" to have wireless, I would recommend spending about the same money (or less) on a wired camera. Better pictures and just an overall better performance.
If you must have the X10 cameras, some good deals can always be found on Ebay

JMYI