I suppose a gun purchased from Andrew Litt in the UK could be considered 'gray market' by Perazzi USA or one their distributors, but "THE HACK" identified the real problem for Perazzi Italy. There have been any number of 'up-graded' guns that are none-factory on the market over the years. Those are the real 'gray market' guns.
My MX8 sporter came from Litts in 1994...doesn't look at all gray to me.

"I hate rude behavior in a man. I won't tolerate it" - Capt. Woodrow Call