Ok first go to staples.com order the memory it crucial 256 just search for it or look in another post on this site.
Next use a 30 off coupon. That brings it to around 107
Third go to crucial.com/webpromo (must use webpromo to get 15% off)
Search for the same memory (again look at the old posts for the right number)
Fourth the tricky part call staples tell them you want to PM with crucial.com/webpromo walk them through the web site. If they say they don't PM with crucial.com hang up call back. It took 4 csr until I got one that would do the PM.
Do it on a business day, so they can call crucial themselves. I was on a confrence call with the CSR and a crucial rep. The crucial rep needs the staples part number it begins with an LM I believe.
Then if your lucky you won't have to mention that crucial does free shipping if not let em know. It they say no pay the 7bucks or call again after you receive your order to get the shipping back.
Good LUck