I did that with my most recent MBP purchase for a 2015 (back when it was new). I ended up getting $250 off of retail despite the fact that the Macbook had never even been removed from the cellophane wrapping. All of the accessories were still bundled up like-new, and even the stickers/ manuals were in the box. The box literally was just opened and thats it. You can't beat BestBuy's open box deals, that's for sure. The best part is that they still carry the Apple care warranty. I also purchased on my credit card which extends the manufacturer's warranty for another year. SCORE!