Ray, it's around $1.50-$2.00/ft if you buy locally... for anything more than a few feet it's worth buying online at savko.com (the lowest price I found), even with shipping charges factored in. Their price is $0.74/ft and you get an additional 5% off if you buy a 50ft roll. That's what I did... and then sold what I didn't use to another BRS member, at cost.
Nuno