Typical U.S. mail order site for the NextImage:
http://12.162.177.70/product.aspx?pid=319-326-4151
I got mine for $99US plus air shipping so saved lot's of $'s. I noticed recently that Celestron are trying to stop their U.S. dealers from shipping O/S. So it worked out at around $150 Australian, which is a nice saving considering you will also need a UV/IR filter at $50US (I am sure it's a lot more here).