Amazon offers the Crucial M500 240GB Serial ATA 6Gb/s 2.5" Internal SSD, model no. CT240M500SSD1, for $149 with free shipping. (B&H Photo-Video charges the same.) That's $0.62/GB and the lowest total in-stock price we could find by $25, outside of the price below. (We saw it for $4 less last month.) It features read speeds of up to 500MB/s and write speeds in excess of 250MB/s.

A close price: Newegg charges $149.99 with free shipping.