If your cat gets knocked up and you are forced to rehome the kittens, there's no real moral issue per se. However, the fact that people will pay anything from £30 to ~£50 for a mongrel kitten encourages arseholes to deliberately get their cat(s) pregnant as often as possible to make a quick buck at the expense of the health of the cat. If any kittens from the litter aren't bought, they'll usually be "discarded" or sent to cat's protection or similar. I don't have a problem with buying a cat privately, but as (I think) Chris pointed out, it's a false economy if you do it for purely financial reasons, plus there's a really wide selection of kittens currently living in the garages of CPL volunteers because they've been finding many stray cats who have recently had litters. xx