Ebay offers Crucial - MX500 4TB Internal SSD SATA for $237.99 (reg. $349.99) free shipping.

Product Description:
Start your system in seconds, store up to 4TB of data, and upgrade with an SSD you can count on. Join more and more people who are keeping their family videos, travel photos, music, and important documents on an SSD, and get the near-instant performance and lasting reliability that comes with solid state storage. Upgrade with the Crucial MX500 SSD, a drive built on quality, speed, and security thats all backed by helpful service and support. Even if youve never installed an SSD, dont fear our step-by-step guide walks you through the process to make installation easy. Its worth it.