Just upgraded the storage in my laptop, so have two of these for sale.
Mint condition, will be fully and securely wiped before shipping.
I was using them in RAID 0 format - so the system sees a single 256gb drive - incredibly fast read and write speeds.
These are the Pro version, top of the line and only just been replaced with the 860 pro. Replace the system drive in your laptop or desktop for a very noticeable speed boost.
Pics can be supplied if required. More detailed info here: http://www.samsung.com/semiconductor/minisite/ssd/product/consumer/850pro/
£50 per drive or £95 for both