Have to agree with the above, so its a bit of a trade-off, if the cat recorded thing doesnt matter to you then you could get a chance to buy a car you possibly could not afford "MARKET VALUE" for.
My 2003 206cc worth easily 4-4.5k, dealer told me would only be worth 3.3k,
It did actually sell for retail money, with everything declared and HPI report given to the buyer, i beleive its also against the law to sell on a cat recorded car without dislosing the fact.