Modern home is the dealer of Yamaha musical instruments I bought a digital piano two month ago and I'm very satisfied with it so far, especially that I searched around a lot and fount that this is the best deal.
They have upright pianos as well, starting from QAR11,000. but tuning is a bit costly as it costs around QAR750 (you have to do it every 6 months or everytime you move it). re-selling the used piano is possible as the salesman told me. here is the Modern home umber:4422815. their website is not working which weird www.modernhome.com.qa