i would buy a cat d, mine is one

at least if its a cat d you know its been repaired & recorded properly
how many cars on the road are write-off's but never have been recorded as, but are still put back on the road
your hardly gonna be looking big money for it when you go to resell it - you got it cheap so you'll sell it cheap - anybody who knows about cars will be willing to take a look
and also with it being a 2000 its not gonna be hard to track previous owners to find out what happened to it
cat d wouldnt put me of a car - it'd be worse if i paid full price for it to find out later that it was a cat d