I have seen it up close and the conversion was done really good.
The major price tag is because it also sports an ESS supercharger.
They cut the load bin top, the B pillar, rear window and part of the roof off a Corsa UTE and mated that to the M3.
Load bin is really small. Not more than 1m wide.
It was not an accident damaged M3 that they started off with.
It is used by the owner as advertising for Monaco Motors