Someone is selling a renewed 3yr old U3 (made in Japan). I know nothing about piano but want to buy for my kids. That renewed piano was brought in a muscial centre in Mongkok and 10 yrs warranty (3 yrs left) and the original price was around 20000. How much does it woth now and any comment to buy a renewed piano. By the way, I have just checked the serial no. and the manufacturing date was around 1976 (ie more than 30 yrs old).