Transcend 256GB 2.5" SATA III Internal Solid State Drive (SSD) for $129.99 shipped.  Here is a screenshot for your reference.  Alternatively, it is available at Newegg for $129.99 shipped.  It features SATA III (6 Gb/s) Interface with 290 MB/s max write and 520 MB/s max read.  Most places have it for about $149.