Amazon Warehouse has started another very generous promotion, and you could check out the deal here.
Until July 2, purchase any products on the offer page and a further 30% off will apply automatically at the check-out stage. Amazon Warehouse sells used / returned products which means they are already cheaper than brand-new counterparts, and another 30% off makes the deal even more attractive.
Product conditions are described as Like New / Very Good / Good etc on the page, which gives you a rough idea what to expect.
30% is the best-ever discount that Amazon Warehouse offers – I jumped onboard last time and purchased a Brita jug which I happened to need. My experiences buying from the Warehouse vary, so make sure you inspect the item carefully when they arrive. However, you can always return for a refund therefore there isn’t much of a risk.