Online advertising - if your property is advertised on only 1 or 2 websites then this could seriously reduce the chances of finding a buyer for your home. 80-90% of successful property buyers find their property on the Internet.
Photos - not enough photos or ones that are badly taken can often turn away potential buyers.
Asking price - an unrealistic asking price may be one of the reasons why your home has not yet sold. Estate Agents often exaggerate a property's value to win an instruction. However, this does not help when selling the property as today's buyers are often quite savvy with property values.
Time-wasters - estate agents that send you viewers who have not yet sold their own property are wasting your time. You must insist on viewers who are in a position to proceed and are not stuck in lengthy chains.
Missing out on potential buyers - is your estate agent able to take enquiries out of hours and at the weekend? Do they have a 24 hours a day, 7 days a week enquiry line for potential buyers to call?