Corsair, like Kingston, Sony and other well known brands have fallen victim to fraudsters producing counterfeits or re-programming drives to false capacities. The fact that this listing is in auction format with a start price lower than wholesale makes us wonder whether victorl_69 is selling fake corsair drives. Please let us know. If you buy one of these the easiest way to test is with h2testw.
Report in to SOSFakeFlash if your testing confirms you have a false capacity device.