Supposedly, .hack 2 is one of the hardest in the series to get (along with 4). Outpost is currently selling these titles with free shipping.
.hack 2: Mutation:
http://shop4.outpost.com/product/3646975?site=sr:SEARCH:MAIN_RSLT_PG
.hack 3: Outbreak:
http://shop4.outpost.com/product/3746356?site=sr:SEARCH:MAIN_RSLT_PG
.hack 2: Mutation:
http://shop4.outpost.com/product/3646975?site=sr:SEARCH:MAIN_RSLT_PG
.hack 3: Outbreak:
http://shop4.outpost.com/product/3746356?site=sr:SEARCH:MAIN_RSLT_PG