Fridge Brilliance: Why does he wear the headset? Ever seen a salesman selling stuff like Slapchop and Shamwows at a Flea Market, Costco, or County Fair? They wear the headsets connected to speakers so they can be heard above the roar. They also tend to have a very distinctive, hyperactive style of selling. Mr. Offer is simply filming himself doing his normal County Fair style sales pitch -- something anyone who's been to one of these bazaars would immediately recognize and empathize with. Brilliant!
It should also be noted that part of why he wears the headset is to disguise impaired muscle control on that side of his face caused by a stroke he suffered in 2001.