Mwave offers the BUSlink CipherShield 240GB USB 3.0 Encrypted SSD, model no. DSE-240SSD-U3S, for $509.99 with free shipping. That's the lowest total price we could find by $103. It is FIPS 140-2 compliant and NIST certified and features AES 256-bit key encryption and transfer speeds of up to 5 Gb/s.