A word of caution, the residential market is softening or is soft.

You need to price the property right, I would say just under recent comparable sales.

Not sure how strong your market and what the correct price is. You can go on line and get a free avm valuation assuming your house is similar to other homes in the area, using zillow. If the homes are not similar I would suggest getting a appraisal done by a appraiser with MAI designation. http://www.appraisalinstitute.org/

It might be that the current offer is fair and you should take it. You might be better off paying the commission and selling now.