I tried to make the point that these things are never black and white, and you respond by asking, "Black or White?" (I'm not really sure if by "...transaction, selling for..." you mean a listing or a closed sale.)
Question:
Is an arms length brokered transaction, selling for 20% below the established market levels considered a valid comparable if all elements for a sale contained in the definition of Market Value are there?
In your example the unadjusted listing prices might be somewhere around $565k. I don't think the listings would be anywhere near that low in a stable market. Having two listing agents each set an asking price lower than the closed $585K comp would be... uh, out of character?
Do you adjust listings in the grid? Nope
Then why grid them?
Why not? Is there a rule that says if they are in the grid of a "form" page, they must be adjusted?
The "why not?" would be placing them in an adjustment grid, then not adjusting, implies no adjustment should be made. If there are real differences that would be adjusted if it were a sales, the report would be misleading. If you are not going to adjust, don't use a grid.Do you adjust listings in the grid? Nope
Then why grid them?
Why not? Is there a rule that says if they are in the grid of a "form" page, they must be adjusted?
They must be analyzed and adjusted based on the markets' perception of list price v sale price typical in a specific neighborhood as of a point in time. If not, and/or if given NO WEIGHT, they have no place in a grid. If analysis of the prior 1 month to 12 months worth of reported MLS sales ALL indicate typical List to Sell Discounting is characteristic, then failure to acknowledge that fact by adjusting the Listings used in a grid as Comparables..... is assuredly misleading.
Unless local properties ROUTINELY sell at 100% of List - not adjusting the Listings, if inserted into a grid AS A COMPARABLE, should reflect typical local BUYERS actions i.e. unless unique properties or in extremely high demand, school, water, mountain/valley location demand market segments.... Sellers, Buyers, Listing and Selling Agents, and Lenders all KNOW (and can prove via MLS data) that IF utilized in SCA - Listings should reflect the TYPICAL L/S price discount customary in a neighborhood. Failure to reliably report and adjust for that aspect of market conditions by ignoring buyer and seller actions (discounting from List) is intentionally negligent.
PE- LP/SP discounting analysis and adjustment is absolutely no different than extracting typical DOM forecasted for the subject or analyzing and reporting prevalent financing trends including adjusting for concessions to comparables (if market-indicated).