<font color='#000080'>Chris,
Have you tried phoning Denny Divers in Redcar? They usually beat any real quote. We phoned up after the Dive Show for a 15lt and he knocked off a fiver, and he was the cheepest quote i'd had of for places in the NE. Then again SDS will sell you at a cheaper price than advertised if you go to the shop. We bought my regs there and after asking the sales man about the price of cylinders, he said, Oh thats the retail price, we'll sell cheaper than that.
I think if you turn up on their door step and wave crisp new notes under their nose they usually do you a deal. Then again I don't know where you are, is Tigerdive a non-Britain outfit?
Dave C