Amazon offers the Sandisk Extreme Pro 240GB 2.5" Serial ATA 6Gb/s Internal SSD, model no. SDSSDXPS-240G-G25, for $149.99 with free shipping. That's the lowest total price we could find by $46. It features read speeds of up to 550MB/s and write speeds of up to 520MB/s. It also includes a 10-year SanDisk warranty.

Update: Newegg offers it for $134.99 with free shipping via coupon code "GASSDTEN".