I bought a Cut40 about five years ago and I think it was from the ebay seller in Lancashire who was mentioned earlier in the thread. (It's almost exactly the same as the Cut 50 pictured earlier). It's really only had hobby use with me, but it's performed well for what I want. Last job was cutting a neat hole in one of my gas cylinders for my chiminea project.
It seems others have been much harder on theirs than I have though!