Nothing to be afraid as long as you don't sign anything, do not give your particulars and do not follow him/her to any office.
Keep things neutral. You will be safe and sound

. In whatever situation, you won't be scammed if you perceive it as \"too good to be true\".
But people is enquiring about your property, doesn't look like any scam. You put your property on the market, obviously people is gonna call you. Meeting anybody is a good source of information or etc. People is unique, you learn things from people to people. Don't need to be afraid of this guy, perhaps he end up buying ur apartment,