Steam Will Now Email You When Wishlist Items Go on Sale
It seems as though a new feature was recently added to Steam that many people have either overlooked or simply did not want to talk about. Steam will now send you an email when items on your wishlist go on sale.
To set your preferences, load up Steam, click on your account name on the top right corner of Steam, select Account Details, and then click on "Configure your email preferences" on the right side of that new screen.
Steam > Account drop down > Account Details > Configure your email preferences
I probably wouldn't have even noticed this if it weren't for a thread on the Steampowered Forums