Well you got.......
.........a bloody bargin. I just called him and as it happens he's 20 minutes from my office. He advised £60 and £10 postage but of course less the postage if I collect. I'm going to drive over tomorrow lunch and take a look. He says he has a couple of different types which were all from Northern Diver. For some reason the material is porous if you're immersed for over 15 minutes but fine for short periods, therefore, N.D had to sell them off cheap without their normal guarantee. I'll let you know how I get on.
Buy it & Use it, then sell it and buy something bigger