Bought these a couple of months ago on e bay £430 delivered, you can drive on almost flat to the ground and then two hydraulic rams lift the platform to 15 inches off the ground, just look at the clearance under my Doblo.

Looks good for access. Just one question are there locking pins to prevent the ramp lowering when the hydraulic pressure comes off ?

Slight correction I have just found my credit card bill and they were £450 delivered.
Yes there are locking mechanism on each one but in order to be double safe although it's in the locked position I still have the hydraulic pressure on and also 2 axial stands under the van.