Call their employer and previous employer (if they have one), call their past landlords, get references, find out why they are moving, take a peek inside their car to see how it's kept.  

This condo is downtown, one block from the main drag, with a peek-a-boo view of the harbor. 

Thank you all for the warm welcome.Could you guys take a quick peek at a question I posted, https://www.biggerpockets.com/forums/519/topics/41...Thanks.

It would be nice if you could peek into a time graph for each zip code in a region to see how the composition of wage earners is changing over time.  

All my peers are seeing longer queues of applications even with big rent raises to market.Read my paper a file hung off my profile 1st paragraph How to Buy a Bullet proof rental portfolio for a peek at a landlording business model thta is tenant centric. 

A combination of being young and dumb, thinking I would live there for WAY longer than I did, putting WAY too much money into a house that would become the nicest in the area and wouldnt get value back due to comps and buying at the peek of the market.Sometimes its better to walk away from a bad situation and put yourself into a better situation.  

If its vacant, peek in the windows.

Values have peeked. 

is he peeking in windows?

It is a useful peek, but I wouldn't go crazy trying to drill down on it.