I would love to know since those answers would be very beneficial to clients. I will take a stab at what I think are some of the top mistakes, not in order:
1) Doing renovations prior to sale that don't give maximum ROI. (Return on Investment)
2) Keeping too much clutter in the home.
3) Trying to sell the home without a realtor.
4) Accepting an offer before knowing if the buyer is qualified.
These are just a few...did they make the list?