Aug 20, 2014 Used yamaha u1 or yamaha u3? ? ? on: April 20, 2013, 12: 28: 04 PM QuoteModifyHi, I am in Singapore and am looking around for a used piano for my daughter who has just learnt a few months. Saw a used yamaha u3 serial number 245xxxx which costs Sgd2800 dark mahogany colour which includes moving n tuning n 3 years warranty.