Update: LEGO Ninjago Ultra Sonic Raider is now down to $53.38 (reg.$79.99) which works out to be 33% off. Monster Fighters Vampyre Hearse is also down to $26.39 (reg.$34.99) which works out to be 25% off.
Forum member SpaceViking informs us that Amazon America currently has LEGO Creator Seaside House on sale for $35.74 (reg.$49.99). Savings work out to be 29% off. Free shipping and no tax for most states.