of an alleged violation of fair employment, fair credit reporting, . . . 

They might run 100-$500 an hour, but it would be 100% totally worth it to file a lawsuit in federal court alleging fraudulent inducement, misrepresentation, duress, etc. 

Lease expire 07/31, but they have abandoned the property and allegedly moved out turned off AC, water etc.. and it’s trash everywhere,disgusting and mold and insects are building up.

The E&O coverage among brokers can vary wildly, and transactions for agents under that policy are sometimes completely excluded - even if they aren't excluded, I'd expect some waffling on the insurer's part if they suspect any hinkiness to the deal, and a wronged homeowner is most certainly going to allege that you are hinky.

And, going forward, add a covenant to your lease that states that 'this is a crime-free property' and that any allegation of an illegal crime does not need to lead to arrest or conviction for the tenant to be immediately evicted from the property and that the tenant agrees to voluntarily and immediately depart.  

Both specialize and are allegedly engineered studies. 

Prices are crazy now with the alleged "supply chain" issues, but today they range from about $650 - $1100.

Other potential lawsuits an arbitrager could face are practically endless but the most common ones would be the owner claiming your negligence caused  property damage, a renter alleging wrongful discrimination, or someone bit by a dog or bedbugs or sick from mold, slip and falls, fair housing laws violations, etc. etc. you get the idea…). 

The Confidentiality Clause (if you sign it) states you cannot disclose and keep factual allegations to yourself.

The client is alleging that as his agent, Umansky misrepresented the value in order to profit from the sale personally.