Buying a new set is not a solution unless you kill all bedbugs. There should not be a single one at you home. Once you kill all then no need to buy new set also as well. So what you can do is to keep all the things of your bed room (Where bedbugs available) in the hot sun as long as you can. It's the best medicine for bedbugs. But when you keep all the things (Your bed, Sofa, cloths, Suitcase etc.) in the sun just check your room every single inch to make sure that there is no bedbugs and then bring all your things back room from the sun. Arrange everything properly......go to your bed & now you are in safe mode.