Floyd Mayweather -- If You Buy My $3.8 Mil Ferrari ... I'll Throw In a Pic!

Are you rich? Like REALLY, REALLY rich???

Well, good news ... 'cause Floyd Mayweather says if you drop $3.8 MILLION to buy his ultra-rare Ferrari Enzo ... he'll throw in a picture with you FOR FREE!!!

We already told you Floyd's been getting serious interest in the car from legit billionaires -- but they all seem to have special requests to sweeten the deal ... from photo ops, to video shoots ... one guy even wants to spar with Floyd.

So, when we shot Floyd out in NYC after he finished up some jewelry shopping Wednesday ... we had to ask if he was down for a photo op with whoever buys the car.