I was in the same boat as you, I wanted a van for me and my little one to use and have some fun at the weekends, I set my budget around the same as yours....Then completely ignored it lol.
My number one most important thing I wanted was NO RUST!
Not an easy goal when looking at vans over 20 years old! But I am a mechanic ( 0r was a long time ago! ) so mechanical issues dont really bother me, i mean most mechanical things are just bits bolted together, so if something breaks you just unbolt and replace.... but rust is evil

It can kill a van, and I dont have the skill or inclination to learn how to weld!
So i searched out a van that had very little rust, It had been resprayed a few years earlier but the interior was removed and in boxes so i could check places like behind the cooker area.
As others have said, there are lots of vans out there, try not to impulse buy! i know how hard that is! To me it matters not that mine isnt a top marque westfalia model, im not playing top trumps

My budget wouldn't stretch that far sadly, but she is a solid van and a bit of a blank canverse inside so i have decided to refit using brand new custom built interior.
One way of getting a better van for less money is to look for one with a blown engine or some other mechanical problem, depending on how good you are with the spanners! Most garage bills are made up of labour charges, so if you have the time and energy to do the work yourself you could save yourself loads of money, If its not going to be your daily commuter then think of all the fun you will have laying underneath your van

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Happy hunting, and i promise you your first drive in her bringing her home will be memorable, I know mine was!
edited coz i cant spell!
2.5 Quad Cam Scooby engine . Westfalia California 1989