Buying our first caravan, any advice appreciated!

Tizwaz24

Hello, we are planning to view a Bailey Senator Series 5 Carolina and an Avondale Argente 640 (both 2006) next week, we have been looking around and really like the layout of these two models with fixed bunks and end washroom, they are however quite rare.
Our queries are: which of these is a better quality/reliability and are there any others of this layout? And as we are complete newbies what advice would you give when buying your first used caravan? Your caravan knowlege gratefully received!

Tizwaz x