Buy.com offers the Crucial 128GB M4 2.5" mSATA 6Gb/s Internal SSD, model no. CT128M4SSD3, for $89.99 with free shipping ($0.70). (newegg charges the same price.) That's the lowest total price we could find by $14. With diminutive sizes, mSATA drives are meant for more compact computers, such as laptops or even small form factor desktop PCs. This model features read speeds of up to 500 MB/s and write speeds of up to 175 MB/s.