According to your birth star purva phalguni is your Zodiac Leo and swami is sun. So East direction is the best direction to buy a flat. Vastu Shashtra also indicates that the East and North facing direction is most suitable for house flat and etc. You should try to buy East facing flat in East direction.
My DOB is 15/08/1988 rashi Leo Uttara nakshatra 1st pada. Which direction home gives me luck?