depends on if you plan on advertising as trade?

you might encounter problems if you advertise as trade, as soon as you do that buyers have certain rights if something goes wrong.

Also, you might have to start declaring profit to the tax man if "trading". When you buy a car do you normally get the yellow slip filled in? or do you put them in your name?

if you want trade insurance to cover vehicle you intend on buying, try insuring yourself as a part time mobile mechanic or valeter, works out cheaper that way apparently