A CMA tells you what comparable properties sold for. That is useful and it is not the whole job, because the number it produces assumes your listing will be presented about as well as the comps were.
That assumption is doing a lot of work, and nobody checks it.
The second pass
Run the CMA the normal way. Then go back through the same set of comps and ask four different questions.
How were they marketed? Pull the actual listing photos of every comp. Not the data fields. The photos. Were they shot well? Was the house staged? Did the copy say anything?
You will find, reliably, that the comps clustered at the top of your range were presented better than the ones at the bottom. Not always. Often enough that you should look.
How long did they take, and what happened in between? A comp that sold at $1.42 million in nine days and a comp that sold at $1.44 million after ninety-one days and two reductions are telling you completely different things. The second one is not a higher comp. It is a cautionary tale with a higher closing number.
What did the ones that failed have in common? Expired and withdrawn listings are the most underused data in any CMA. They are the record of what this market refused to buy at what price. Pull them. Look at the photos. Usually a pattern appears within four listings.
What is actually competing right now? Your seller is not competing with what sold in June. They are competing with what a buyer can see this weekend. Walk the active inventory in person if you can. If you cannot, at least look at every listing a buyer would see alongside yours and know what they do better and worse.
What this changes in the listing presentation
It changes the conversation from "here is what your house is worth" to "here is what your house is worth, and here is the gap between the bottom and the top of that range, and here is specifically what closes it."
That second half is the part sellers hire you for and the part most presentations skip entirely.
When you can say "the three houses that cleared $1.45 million on this street were all professionally staged and shot at twilight, and the two that stalled were not," you have made an argument for your marketing budget that is based on their neighborhood rather than on your opinion.
The number you should also show
Days on market by price band. Take the last twelve months in the immediate area and show what sold within thirty days versus what sold after sixty.
Almost every market has a visible cliff. Below a certain number things move; above it they sit. Showing a seller where that cliff is, with their own neighborhood's data, is more persuasive than any amount of talking about pricing strategy, because they can see it.
Where to be careful
Do not let the second pass become a way to justify whatever number the seller wants. The marketing argument is real, and it has limits. Great presentation moves a property within its range. It does not move it into a different range, and an agent who implies otherwise is buying a listing they will spend four months apologizing for.
If the honest answer is that the house is worth the middle of the range and nothing you do changes that, say it in week one. You will lose some listings to agents who said something nicer. You will lose fewer sellers.
And one thing to stop doing
Stop presenting the CMA as a spreadsheet. Nobody outside this industry reads a grid of comps.
Three numbers, a short sentence about each, the days-on-market picture, and the photos of the two comps that prove your point. That is a listing presentation. The spreadsheet can go in the leave-behind.
General information, not appraisal or financial advice.