Hi Keef, welcome to the Practical Caravan forum
You've come to exactly the right place for advice on what to look for when buying your first tourer because the members of this forum have owned most types good and bad.
Now that you've introduced yourself you would be better off if you asked your question on the General message board, where many more forum members will respond with advice.
First of all though,
Click Here to have a browse through the Used Caravan Buyers Guide which will give you a good basic idea of the ings to look out for when buying a tourer, click on the oblong buttons down the left side to see more detailed advice on various aspects of the transaction.