hasbrotoyshop.com has the Red Skull Onslaught Legends wave on sale for 9.99 each (except for Taskmaster, who's out of stock). Coupon code HERO17 gets you an additional 15% off. Easiest way to find them is probably to search for 'legends' and then sort by price. There's also some discounted stuff from the Giant Man and Abomination wave.
Not particularly interested in most of the figures from the Onslaught wave (Whirlwind seems rad), but I do like how that Onslaught BAF looks and I've got Kitty with the Magneto head, so I went ahead and picked 'em up. 6 Legends and a BAF for 50 bucks seems fair enough to me.