Well, I say cheap.... It seems to me, living in Dubai and browsing the property listings that the prices just keep going up. I thought they world have topped out a bit by now but they haven't. For you, I don't know if you're buying for investment or a home, and how long you are prepared to wait for the place to be ready to move into, but all these factors are really important when considering a place. If you want really cheap, buy a place that's just been launched. However, you'll have a wait a LONG time for anything to appear out of the ground. If you buy a resale, hopefully it'll be started or even nearly finished. However, you'll pay a LOT because of the rental possibilities as an owner.
As for me, I really don't know if my future is in Dubai and I don't want to look after something from afar. I'd like to buy in Singapore, that's always a safe bet, but TWICE AS EXPENSIVE as Dubai.
Give it a lot of thought before going for it.