A week ago I posted that Diablo 2 is back on the sales chart. I also posted that if you want a copy, you don’t need to purchase a retail copy for $55 (for the Battle chest) or $35 (for Diablo 2 and LoD).
You can purchase a Diablo 2 CD key for just $5 online. Once you have your CD KEY, you go to Blizzard’s online store, you register and then proceed to DOWNLOAD your copies of Diablo 2 and LoD.
Update: You can purchase a cheap Diablo 2 cd key here: link 1 and link 2.