Everyone has their own moral boundries. Some may do it. Myself ( and likely the store ) would call it stealing. This was talked about recently in a thread.

That being said one day I tried to buy a VR in 711 and it was cash only. I went to put it back and he told me I could keep it if I wanted. Point is : it wouldn't hurt to ask. Doubtful they would let you but ya never know!