You may well need a van or estate car to collect goods from cash and carry outlets and other suppliers and, possibly, to offer a delivery service. The cost of the vehicle will depend on the size, make, model and specification. You could look at used vehicles as well as new ones. The older the vehicle the less it will cost to buy, but very old vehicles may not be economical to run and may project the wrong image for your business. An alternative to purchasing a new or nearly new vehicle outright would be to lease one.
Don't forget to make sure that your vehicle insurance company knows that the vehicle/s will be driven for business purposes, possibly by several different drivers.