For sure this aging thing is real. We once bought a house for $75,000 under the original asking price. It was likely priced about $25,000 high to start off, then sat on the market a long time as a result. It had dropped by 35000 or so by the time we looked at it for the second time, and they took a moderate but not full-price offer.
You may tell them this cautionary tale with whatever embellishments you would like to add.