Is he trying to sell you something or buy some thing of yours? I always request a phone number and have a conversation just to be safe
I had a WTB for a 20 gauge supersizer. Same story, asked me to text him. Responded with a PM that I was not interested at the price he wanted. His response was "how much are you willing to pay?". Responded with PM telling him to pound sand. Reported him as possible scammer.