When word spread in February 2014 that IKEA would be discontinuing its popular Expedit shelves, its average selling price on eBay shot up 23 percent—from about $94 to $116—according to the auction website's sales data. The shelves' simple, goes-with-anything design makes them a staple in $12-million homes and studios alike, says Jeremiah Brent, interior designer and curator for eBay
, especially since they can be used individually or stacked to mimic floor-to-ceiling bookshelves. (And, as Lifehacker's tutorials prove
, can be used to make bed platforms, benches, storage tables and TV stands. If you're over the look, reselling yours could fund your next living room mini-makeover.