Whats the Cheapest 4gb or 8gb ram , 1066MHz DDR3 SDRAM anyone has bought or found and which website or store. If you upgrade an Macbook pro 13" (uk store) to a 4gb ram it cost an extra £80.01 and to add 8Gb ram cost is £880.00 (yep very expensive). Most people have advised NOT to upgrade ram from Apple as they charge a hefty price. Anywere else to buy ram and kind suggestions. Thank you in advance.