not sure on the vans at the mo matey,on the cars you can get manheim assured which is a 3 day warrenty from manheim and any probs take it back. not many have that but big groups do. the manheim van sales i go to are sold as seen but i have had raving mint vans and they are sold as is.
i would make sure you only buy a van from a major vendor like a leasing company who don't tart the vans up and try and make the shit look better. you will see somthing you like i'm sure. heres a top tip from me to you,if you see summat you like and wonder the price of it just pop over to the reception and ask the girl on the counter what the vans reserve is, they tell me when i ask.

i have had loads of vans out of manheim and its a very good place to find a good van.

if you need any more info i'll gladly help you. if you want to know any trade prices of the vans i posted i can get the info,just ask.

cheeRS Karl