For its current newsletter subscribers, newegg.com offers the Hitachi Travelstar 5K500.B 500GB Serial ATA 3Gb/s 2.5" Internal Notebook Hard Drive
, model no. HTS545050B9A300, for $54.99 with free shipping
. Coupon code "EMCYTZT211" cuts it to $44.99
. ($0.09/GB). That's $5 below our August mention and among the least expensive Hitachi 500GB notebook drives we've seen. (It's also a current low by $5.) This drive runs at 5400 rpm and features an 8MB cache.