Amazon America currently has LEGO 70504 Ninjago Garmatron on sale for $30.4 (reg.$39.99). Savings work out to be 24% off. As always, free shipping and no tax for most states on orders above $25.
LEGO Galaxy Squad Space Bug Obliterator is also on sale for $53.59 (reg.$79.99) which works out to be 33% off. More of their hottest LEGO deals can be found here.