Looking at used RRs...

My wife and I have a Freelander which is coming up on lease. We're thinking of having a second child and have been thinking of going with a Disco II or a RR. We're looking at used since we don't want to spend the money on new.

Anyway, we're looking to spend between $20k and $30k. I'd like as new a RR as I can get for that range but I'm comfortable with getting the older style (although I love the new style).

Are there any years in particular I should watch out for? Are there major problems I should be aware of with RRs 5 years old or newer?

Sorry for the general post here. Just starting my search.

Thanks.