Look past the ad to see the map. Usually we have some introductory text anyway, so this will get you there. The map is just the Hempstead Town listings from the first spreadsheet you sent. There was one sale in early April and 10 sales in August (right up to the 31st), so this seems like five months of sales.
Notice the seller names are just last names. Problem? The icons could be better: small dot is house for under $600K, bigger marker is a home up to $1m; bigger marker with a dot inside is a home that sold for more than $1M (5 of them). This’ll just give you an idea.