Samsung 850 Pro 512GB SATA III Solid State Drive for $315.99 shipped. Here is a screenshot for reference. It features sequential read and write performance up to 550 megabytes per second (MB/s) and 520MB/s respectively, and random read and write input/output operations-per-second (IOPS) up to 100,000 and 90,000 each, which is at the higher end of the consumer SSD performance range. At the time of this post, it has received 4/5 and 5/5 starts from 94.5% of user reviews. Most places have it for about $369.