David,
Haven't heard of that colour and it would be worth checking the VIN to ensure it has been repainted in the factory correct colour.
From the ad, the company don't seem to know 911s well.
Not teaching you to suck eggs but I'd want to know: -
Who did the restoration and was it documented and photographed.
Who did the engine rebuild and was it documented.
What history file is there? Sometimes 'it was restored and engine rebuilt' means there is little to no history file.
Hope that helps.
