GTA V has had a 50% price cut on Xbox 360, but the offer only runs until midnight tonight. It's worth noting that you've been able to get it at this price from retailers for a while, but it's a useful drop for the supremely lazy and those box-haters out there.
It's a slightly sad indictment of digital pricing, to be honest. Apparently not making loads of cases and printing crates of disc is super expensive. Still, sometimes you just have to have it immediately, and maybe that's worth paying for. Not at full price, mind. But that's what deals are for.