Some sellers are selling these at bargain prices....but beware! They are likely to be fake. Some of the packaging may be identical and difficult to tell apart. However, there are two main differences. If you are considering bidding for these, ask the seller if it says "GILLETTE" on the grey part of the back of the blade which would normally indicate a genuine blade. Also, the plastic case in which the blades are supplied is usually clear for genuine blades and green for fake. I purchased about 10 packets (40 blades) for what seemed a bargain price (advertised as genuine!), but they were absolutely rubbish...irritating the skin and impossible to shave with. These looked identical to the genuine product but did not say gillette on the back of the blade and the case was green. They were analysed by Gillette UK and found to be fake.