Not really allowed to talk about rates on the forum as that would be self-promoting, and also it depends on way too many other factors. Deposit can be a little as just the VAT, maybe first payment up front, or as much deposit as you want. Up to you. I do have the ability to fund privately purchased vans, but the conditions are very strict, and the seller needs to have an original invoice from when they bought the thing. Much, much easier to do it through a reputable dealer, and there's enough vans out there that you shouldn't struggle to find one.