He doesn't just sound like a slimeball to me; he sounds dangerous.
I've done fundraising, research and volunteer work for organizations that fight human trafficking, so I admit, I perhaps tend a little toward paranoia on this particular subject, but he sounds an awful lot like the men who feature in a lot of stories I've heard where women end up kidnapped and shipped off to their new "owners."
I'm so glad you were careful, and didn't go to meet him alone.