Adorama via eBay offers the Samsung 850 Evo 500GB Serial ATA 6Gb/s 2.5" Internal SSD, model no. MZ-75E500B/AM, for an in-cart price of $149.99 with free shipping. That's tied with our mention from four days ago as the lowest total price we've seen. (It's also a current price low by $16.) It features read speeds of up to 540MB/s and write speeds of up to 520MB/s.
Best Buy via eBay offers the PNY CS1111 480GB 2.5" Serial ATA 6Gb/s Internal SSD, model no. SSD7CS1111-480-RB, for $147.99 with free shipping. (Amazon charges the same.) That's the lowest total price we could find by $14, although we saw it for $8 less in July. It features read speeds of up to 500MB/s.