Forum member Mrcoolnup informs us that Amazon America currently has the LEGO online exclusive 10223 Horizon Express train set on sale for $101.04 (reg.$129.99). Savings work out to be 22% off. Free shipping and no tax for most states.
They also got LEGO Star Wars Rancor Pit for $47.83 (reg.$59.99) which works out to be 20% off in savings. More of their hottest LEGO deals can be found here.