To be honest, if you price your unit realistically, it will never be an issue to sell it within the stipulated time frame and all RES will be able to assist you. The only thing is how the RES can push for a better than expected selling price.
I have came across cases for private properties sold under $350k below the initial asking price due to marital issues, even though the original askin price was very reasonable and realistic.
If you need assistance, I'll be most glad to offer my services to you.
Real Estate Consultant
CEA Reg R014783H