You should buy a traditional piano instead of Electronic piano. They are totally different.
Go to yahoo auction or the piano shops and look for a second hand Japanese upright piano. It costs from HK$4000 to 10,000 and depends on its conidtion.
Buy a traditional piano la, the electric/digital piano can only give u fun, not designed for fingering exercises. If u just play for the pop-piano pieces, the electric/digital one is good enough. For those more "serious" pieces, traditional piano is the right way.