The standard RE commision rate is 6%.
The range for the prices without looking at the exact address can vary from $125 to $200 per SF.
With more details such as the address, and overall condition, I can email you two reports to help you now...a list of SOLDS in the last 6 months, and what inventory is on the market now that most closely is like your home.
Then, later today I can drive by the house to tighten what you should ask to sell the house.
Email or call me at (504)615-2333. Thank you