Amazon advertised a big music sale in August 2016, up to 80% off selected items it said. And I ended up spending several hours browsing through their catalogue, picking up what I thought were pretty good deals. However, within a week, half my order was cancelled because of "incorrectly posted prices". Now I feel I wasted all those hours browsing through their immense catalogue. I still got some good stuff at great prices (this is why I'm giving them the extra star) but I would have likely not invested the time if they were just going to cancel half the stuff I put in my cart. Advice to Amazon: Don't advertise a sale if you cannot honour your prices!