In case for whatever reason you can't read the post in the picture, it reads:
Met u sold u a car lost contact number
Met sold a car to u u kept looking down on me what was u looking at I think u wanted to ask some thing list contact number
WHERE TO BEGIN?!
He starts off with "lost contact number" (and then an attempt to double down with "list contact number" lol) as if that's a bad thing. That is the right thing to do after you have completed a business transaction with someone, unless there would be reason to follow up on the purchase afterward. So we can basically infer he's only not immediately creepy by default, rather than ethics.
Then "u kept looking down on me what was u looking at." Dude. If she was into you, odds are she'd be making strong eye contact. If she was looking down, you were probably making her uncomfortable. Or she was just, ya know, shy. Either way, this does not at all signal interest or invitation.
Listen, I wasn't there. Maybe she was somehow also being flirtatious. But what's the probability they both lost each other's contact info in that case? If she was that interested, she'd probably make it a point to reach out. I think this was more than likely just an attractive woman trying to buy a car.
But hey, can't blame a dude for shooting his shot.