Hi Twindaddy, welcome to the Practical Caravan forum.
First of all before you spend any money you will need to find out what your vehicle can tow safely and legally
This may help
If you passed your driving test after 01/01/1997 the weight of the caravan that you are allowed to tow may be restricted, don't splash the cash on something that you might be unable to tow.
Click Here for details
The Buyers Guide in the Practical Caravan magazine provides up to date listings of new British and Continental new caravans including details of weights and layouts, a browse throught it will provide a basis from which to start your search for your caravan.
Ask forum members for advice on what to look out for before you buy,
Good luck and enjoy your search