Have you ever heard of "active contingent"? That's a property that's under contract but listed as active, with no way to tell that it's under contract on some of the most widely used public websites including the top-used public website for searches, Zillow.
How Prevalent? 41% of Houses Entered 7-40 Days Ago as of 6/10/23 in Hampton Roads
Main Ways to Avoid the Problem
Here's a video on the subject:
Locating Contingencies on an active REIN portal search on single property
Locating unavailable properties on an active REIN portal search on property list
Locating Contingencies on REIN.com on single property
When are properties least accurate in MLS?
Most images above courtesy Rein.com & https://reinmls.mlsmatrix.com/