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Yes I have had great success when having my listings updated. Freshly painted home helps a lot. Depending on costs updating kitchens and baths has helped in moving some of my listings. Remove old rugs and having the woodfloors polished gives a home that extra boost.
I am reply to the question on (Can you post a condo on the site prior to picking your realtor? You can do this on Zillow - however with my experience being a realtor for th e pas 13 years I think you would be doing yyourself a disfavor. Hiring a professional is in your best interest. Your realtor will get you a qualifyed buyer and make sure that the process is followed through.