I don't believe the Snipe exist either. Anyone says it does yet never provided pics through Snapmatic are actually lying.
The Sultan once spawning, which it does easy by the prison, will spawn 9/10 cars you see. I would rather have the Intruder or this so called Snipe over that. As for the Snipe, I checked all the possible car hashes with a bunch of people and tested them all, and there wasn't a Snipe.
Granted it's not too rare as it sometimes pass around more than the city. The beauty of that vehicle is that it's great for racing for the 4 people that can get inside. Also, when full modded, it reveals on the Sultan's side of the car vehicle as Sultan RS.
Dude, when you finally see this thing, the last thing you are thinking about is busting out your iFruit phone and snapping proof. You'd rather get the Snipe and try for pics in your garage! The ones I saw in SP were brown or tan, but in MP the only one i ever saw was dark green. You go get pics, show us and be the damn hero. I would love to use the pic as my signature or avatar... such a cool car...