June 18 Update: Ariel’s Undersea Palace has been further reduced to $41.23 which works out to be 25% off. (thanks Nepenthe7)
Amazon America currently has LEGO Disney Princess Ariel’s Undersea Palace on sale for $43.4 (reg.$54.99). Savings work out to be 21% off. LEGO City Trains High-speed Passenger Train is also down to $119.99 (reg.$149.99) which works out to be 20% off.