Looks like the real deal with a few improvements/modifications; the seller says he has all the original parts. The fairing looks to me like it fits better than an original, ooo, did I say that?
For sale in Georgia, USA. There was a Forum member/ former Laverda racer, a very knowledgeable bloke, 'Rusty Spokes.' I wonder if he is still around; I haven't seen a post from him in a long time.
The price is optimistic for a very specialized 'collector' bike that few have even heard of.