That did look a good price Stansgran, not surprising they're out of stock! But with the UK postage it would almost certainly just tip over what I've paid for it. Not by much, though!
NanaandGrampy I've been using rotary cutters like that for years - they really are fantastic! I have one of the green self-healing cutting mats, like the one she was using in the video, and a transparent perspex quilter's ruler. When the blades on the rotary cutter start to lose their edge, I put a new one on, but save the old one to use for cutting paper - photos I've printed, home made cards and so on. You can get blades that cut wavy lines too!