local有人卖二手petrof钢琴，要价$5400。卖主说他自己花一万刀买的，没说用了多少
年。卖主是专业人士，用这台钢琴教学生，每年tune两次，well maintained。有人了
解petrof钢琴吗？我百度了一下，是欧洲琴，捷克产的。这个价格买这样一台琴划算吗？
From Petrof's instrument catalogue:
(p.33) The upright piano P 125 F1 is an upright piano from the higher
instrumentsseries. It is a highly favoured model of very wide use. It is
suitable for home and school teaching of key instrument play, for training
needs of professional players,but also for musical ensembles. Its sound will
also please audiences of clubs.The F1 type upright piano body combines
classical and modern style in its finish.
百度链接： http://baike.baidu.com/view/2927573.htm
