He started out last monday selling his wetsuit with a funny description. It became very popular by wednesday so as it says in the advert he chose to 'share the love'. Since then it has become viral and a bit silly with huge bids and lots of companies jumping on the bandwagon.
Good luck to him, even if he only takes 5% he has made far more than he would have done for a second hand wetsuit. It is too big now for him to just take the money and run, too many people following it.