Sold our house a few years back using a realtor. Believe it or not, we had a multiple offer situation and the realtor F**ked it up. BIG TIME! I have no idea what she said to the other parties but we ended up not geting anywhere near the initial offer.
She apologized profusely over the phone and said she would follow up as soon as she got back from Disneyland with the family. Which ended up being a request to connect via LinkedIn, asking for a positive online review and then adding my email to her weekly newsletter without my consent.
Realtors, worth every penny of commission.