Buy.com has dropped the price of the Kingston 4GB DataTraveler DTLocker USB Flash Drive (model no. DTL/4GB) to $17.95, and includes a $10 mail-in-rebate that lowers it even more to $7.95. This makes it $22.05 less than its $30 list price, and turns it into the best cost we have seen for this model by about $9. This storage system offers two different levels of security, and is capable of storing files, photos, and music. FREE shipping has been included as well, and sales tax applies for residents of New York and California.