Depends on the location and on the value added stuff (furniture, compound other facalities etc).

4500 - 8500 is the range in Old Doha (Mansura/Najma) Old Airport Area..

You have to be VERY CAREFUL in signing up the contract, the best is to do directly with the owner and also NOT to pay advance/cash etc...best option is monthly payments and a advance amount.

Hope this helps!!!