A luxury penthouse on London’s Southbank, set over three floors with a panoramic view of London’s skyline…You’d expect to see an advertisement for a property like this in the window of a high-end estate agent – except it’s not.This stunning apartment is on a website that also sells used car parts and advertises the services of dog-walkers and babysitters.The £10.5m four-bedroom riverside apartment on London’s Southbank is the most expensive property ever advertised on classified site Gumtree.Described as minutes from the Tate Modern and Shakespeare’s Globe Theatre, the stunning luxury penthouse in Southwark boasts views of St Paul’s Cathedral and the River Thames.The apartment, which is spread over three floors, has four bedrooms; four bathrooms; a large kitchen, dining and drawing room; and also features a study and a library, with floor-to-ceiling glass windows.The price tag also buys you a 24-hour concierge service, two parking spaces and several terraces and balconies to enjoy the riverside view.Paul McCambridge, head of property at Gumtree, said: ‘We’re over the moon to hit this cracking record at Gumtree. It’s great that agents are recognising Gumtree’s potential to reach a diverse audience.’The company that posted the ad believes it won’t be long before the property is snapped up.Mustafa Kondoz of Denton Consultants said: ‘This apartment is a dream home in a highly sought-after location. We anticipate a quick sale.’(metro.co.uk)ANN.Az