Buying a new caravan is probably the best way to guarantee you have all areas of roadworthiness covered.
Buying from a reputable second hand dealer is also a safe guard and recommended if pre-loved is your choice.
Buying from the bloke down the road or from an internet site is fine and it might save a buck, but is it safe?
Don’t get me wrong, I’ve bought second hand and it’s worked for me.
Sweet old Bob and Vera surely wouldn’t rip me off … would they?
But (always a but), over the years they’ve added this and that and modified things to a point of unsafe driving (maybe a reason for sale). Weight issues are a whole new topic so I won’t go into them today, other than to say make sure the van is loaded correctly and weight is not over the manufacturer’s plated specifications.