Steve makes a good point. If you are looking for an vehicle to overland with, simply the best deal is to buy on that that's already been built and used for that purpose. But people simply turn them down.
Here's the scenario. Someone is selling a used overlander. They want £10k for it. It doesn't sell. So, they strip all of the kit off it, return it to pretty much stock and advertise it for £7k. Immediately a buyer rocks up and wants it. Then, they spy the pile of kit. Roof rack, bumper, tank, fridge, awning etc etc. Ohh they say, that's just what I am looking for. No problem says the seller, you can have that lot for £3k. Bargain shouts the buyer - SOLD.
Tell me I'm wrong. I dare you