Don't let your own emotions cloud your judgement. I didn't feel your reviews were that mixed. The over all answer to your question is to play nice and leave the girls out of it.
Are you moving for the right reasons? As one writer stated in your last post, "moving isnt going to make you happy. sure, certain circumstances are going to change, but it isnt going to change your attitude and your outlook. right now is the worst time to pack up and move because, as you said, you're losing a ton of money."
If depression is your problem, I can guarantee that moving will not fix it and could possible make it much worse!
Perhaps they are expressing, in their own way, grief (and anger) at the end of a wonderful era and the fun you have had together. Perhaps you saw the answers you wanted to see here for the same reason.
As far as what the husband said to the realtor - it is hearsay unless he taped it. If it wasn't physical, so "he promised not to give them his business?". Who cares?
We sold our home just before the fall of the market. And we sold for a high number. And our neighbors were concerned we would cause taxes to rise in the neighborhood. Basically - It's always something!
Now, many years ago, I had a best friend (and neighbor) and we were the same age as your daughters. Her mom was a widow who remarried and the new husband moved them to another state. I knew that my mom was losing her best friend too, but I saw the joy she felt for her friend's happiness.
I saw the happy and sad tears, and at that tender age, I got it.
For my dear friend and I - losing each other was hard and our moms helped us to stay in touch. Barely knowing our ABCs we wrote the simplest of "I miss you and love you" notes and drew pictures to each other often. And our moms mailed them.
Our end result?
My friend has a namesake - my daughter, and over 40 years later - we are still dear friends!
You and your neighbors are now being the role models for your daughters, not how to sell a house, but on how to lose a best friend.
And you are both doing a lousy job of it.