CC insure my van, every year when it comes up for renewal I ask them what the book price is and insure it for what they say is the value.
------------- Bill
For a licence dated 1997 or later you must add together the plated max weight of the caravan and trailer, if the total is 3500 or less you can tow it. You may even tow a caravan with a MAM greater than the cars unladen mass the restriction was removed in 2013
Look in Autotrader, the freebie paper you pick up at fuel stations. There will be adverst for vans of your make, your model, your year, your condition - or almost: you adjust the price up or down if yours is younger / bigger / better. Not the same as someone knocking at your door and offering a fraction of what it's worth. Friend bought their van on Gumtree; and the price of anything on eBay isn't necessarily what it sells for. Lots of scams to look out for if you're thinking of selling there too.