Beware: There is new fraud trend, whereby fraud buyers are showing fake Payment Proof for buying your product listed on OLX. You will not receive money in this type of fraud.
It will seem very genuine, as they will ask for your details i.e. Name, Phone Number, Amount, Time & Date. Finally, they will message you a fake payment screenshot of PayTM containing payment details.
E.x. the screenshot below looks almost real, hence, please cross check whether you have received payment in your PayTM app or bank.