Pricing for Howdens full height pull and swing larder unit?

[Twozealotmorethan1]

Does anyone have any idea how much this costs please? It's the 500mm wide one as pictured below (all the wire racks and drawers that go into the larder cupboard that we already have). I've been offered one second hand and want to make a reasonable price offer.
My local Howdens, being trade only, won't give me a price.
Thanks

Our 600mm wide pull out larder was an extra £300 for the mechanism. It's not as fancy as that one though, no shelves on the door.

Thank you! So I guess at least £100 would be reasonable to offer? It's has all the fixings and is in perfect working order.

I would think so.