Dr Mumbo Guitar for sale May 23, 2012 6:53 0 While he’s happy to lampoon bigger brands, Dr Mumbo does feel a touch guilty for picking on private advertisers. But people on Gumtree really will sell anything. Even air. Hat tip: Kate Taylor topics Advertising, Dr Mumbo, Gumtree Share Tweet Share Comments are closed. ADVERTISEMENT Most Discussed 122 Comments Sky News drops Outsiders from schedule after sacking of Mark Latham 50 Comments Sky News sacks Mark Latham and refuses to say whether Outsiders will remain on air 48 Comments Why that Pepsi ad isn’t as bad as you think it is 37 Comments 457 visa axing to hurt PR industry with ‘PR manager’ to be removed from temporary visa list 35 Comments Job cuts, one brand and the future: Will Fairfax get it right this time around?