“No, don’t use their appraisal, get one of your own.”
And dont forget to add the cost of movers, lost time at work, closing costs on the new house and the new mortgage, related closing expenses, rebate on the unused portion of your real estate tax, time spent looking for a house, your house contract lawyer, your interior decorator on the new house, etc.
I’m not giving up yet. But, I appreciate your advice.