He replied via text message to my gumtree ad about some sandals I was selling. He said his name was Nathan, and asked for a photo of the sandals on my feet.　Then went on to send me messages asking if I was married, then saying "So your husband do not know".
His English does not seem very good (though not sure if that's intentional from the pranker or not).
I'm no longer replying to his message, and despite that he has sent me:
"Wat on you the pic"
"Wat on the photo of the shoes on your feet"
No idea what he's trying to say.