newegg offers the Plextor 128GB M5M mSATA III 6Gb/s MLC Internal SSD, model no. PX-128M5M, for $99.99 with free shipping. That's $0.78/GB and the lowest total price we could find by $26. With diminutive sizes, mSATA drives are meant for more compact computers, such as laptops or even small form factor desktop PCs. It features read speeds of up to 540MB/s and write speeds up to 320MB/s.