Micro Center offers the Micron M600 256GB Serial ATA 6Gb/s Internal SSD, model no. 109389, for $49.99. Opt for in-store pickup to avoid the $5.99 shipping charge. That's $57 under the lowest price we could find for a similar SSD elsewhere.
Dell Small Business offers its Dell 256GB 2.5" Serial ATA 6Gb/s Internal SSD, model no. SNP2F5G2/256G, bundled with a $50 Dell Gift Card, for $149.99 with free shipping. (The gift card appears in cart and will be delivered via email 10 to 20 days after purchase.) Assuming you'll use the gift card, that's the lowest total price we could find by $83.