Buying van insurance online can work out cheaper as most insurance companies offer a discount for buying online.
If you're buying a second van your no claims discount only applies to your first commercial vehicle, but you may still get a lower quote if you haven't made a claim.
Every region in the UK is risk assessed by insurance companies, so even if you are a careful van driver you may pay more on your premiums because of where you live.
Remember any claim made against your insurance company will affect your no claims discount and could lead to higher premiums.