This is the cheapest it's been on Amazon however it does come down to this price every couple of months.

Indulge your inner genius and build this LEGO version of Leonard and Sheldon’s living room as seen in the hit American sitcom The Big Bang Theory! This set was created by two LEGO fan designers—Ellen Kooijman from Sweden and Glen Bricker from the USA—and selected by LEGO Ideas members. Featuring loads of authentic details to satisfy all The Big Bang Theory devotees and including minifigures of all seven main characters from the show, it’s ideal for display or role-play fun. Includes 7 minifigures with assorted accessory elements: Leonard, Sheldon, Penny, Howard, Raj, Amy and Bernadette.