I have that cutter -
I forget how much i paid for it, but i recall, shortly after, i saw another at the boot sale, which had a spare set of discs with it. I tried to buy the second one for the discs, but was not keen enough financially. I suspect the secound one was under a tenner, but that was at a boot sale...
Anyhow, its a usefull cutter. A little unweildy, but i bought it to be able to do 54mm tube, which, assuming the cutter is the same, it will do.