There are many EF-S lenses advertised on EBay, a lot of them are kit lenses.  Unfortunately a lot of sellers don't seem to know which lens they are selling and 95% of the time advertise the lens as USM, when they are not.  If the lens is not marked USM, on the front of the lens or on the body, it is not USM.  I hope this will help you in selecting your lens, always check the front

              Not USM                                                 Not USM                                                  USM