As per @spdpsba post, will you be financing it? That could make a huge difference in price to the used vehicle.
Used £30,000 @ 60m @ 7% = £35459.83 or 60 fixed monthly payments of £591
@ 9.9% it would be £37783.38 or 60 fixed monthly payments of £630
VS
New £46,990 @ 60m @ 0% = £46,990 or 60...