First post on SD! This certainly isn't the slickest deal for ON whey, but deals for Gold Standard whey seem to be sparse in the past couple months, so I figured I'd post.
bodybuilding.com has Gold Standard Whey Protein 5 lb tubs for 2 for $99 and a promo code for 20% off and free shipping over $20. Total comes to $79.20.
I also use BSN Amino X BCAA supplement which is BOGO 50% off right now, with the promo code it comes to $24 for 60 servings which is also a decent deal.