During inspections or walk through you can bring a GC in for scope of work.

Say, "I was walking past your door and I saw and smelled a cloud of cigarette smoke coming from your unit.

Drive and walk the neighborhoods.

Otherwise, have contractors come to the property and walk it themselves and get a bid, which is probably going to be more accurate, but may be harder to do as contractors are very busy across the US right now.

Have had a client walk away from closing with a check from the bank instead of having to bring money. 

Will also impact the walk away money for a client at the sale of a property. 

. $50,000) but make their offer contingent on an in-person walk-through within 72 hours or a review of the financials within seven days.

Did you walk them through troubleshooting steps before calling a technician?

I have to walk the properties and get some pics, maybe you’ll be interested in taking them off my hands ?

We are also not likely to see people just walking away from severely underwater properties, because nearly every market's real estate prices are well above pre-covid levels.