Samsung SSD 830 2.5inch SATA III 6GBps 256GB Notebook Accessory Kit with Free Norton Ghost 15 £139.99 delivered @ amazon UK
no need to describe what this is about.
cheaper than ever before. last time seen on HUKD for £148/£155
might get OOS quickly, but you can order now, and amazon will dispatch when available (should be soon) and honor the price.
amazon refunds the difference for drives bought earlier - at least the ones bought for £155 (credit: marshalex)
the dispatch time for the ones ordered for 139.99 is still unknown, but my guess is it would be several days, maybe a week.
when you order, your card is not charged until SSD is dispatched, so if the price drops you can get them to price-match, if it increases (unlikely), just cancel the order. But from my personal experience amazon always honored the order price.
technical stuff: this will suit both laptops with 7mm and 9mm drives, as it's 7mm thin, but has got spacer in box. for desktops, all you need is this or similar:
or some cheapo from ebay.