£204 on box.co.uk
Always read the label and price when buying things they might be cheaper elsewhere
Yes you could. More details at the page linked below (& at many other sites): [ http://www.omgchrome.com/how-to-add-swap-memory-to-your-chromebook/ ]
You could enable ZRam by pressing Ctrl+Alt+T to open a terminal, Type "swap enable 2000" and press Enter to get a major speed boost without a ram upgrade.