My 7 foot spinning rod for trout/redfish was about $175. Billy says the cost for a spiral rod is about 10% or 15% higher. The other forum I surf has a drawing for a free Billy stix next week and a discount offer, if you want to check it out.
Suprisingly not as much as you would think. They cost about the same as any high quality production rod. Plus when you get it you will realize that you didn't just buy a rod but something you will be proud to pass on to children and grandchildren.