Owner has main water supply shut off till inspection day. Why?

[Rick Hernandez]

Good morning,   I have a home under contract.  The seller purchased this as a flip and is now selling the home.  It's not a high quality flip so still some work to do.  When I walked through the home he had the water shut off at the street.  I have home inspections in less than a week and the owner says he will turn on the water before the inspection. 

 My questions is why would he do this.  It seems odd and suspicious to me.  Is there a small leak somewhere that he is hoping to hide?  I have never encountered this on a sale that is not foreclosure.  Any experts out there that can offer up some advice on what I should be concerned about.  No signs of water in the basement at this time and he has finished off the basement.

Thanks in advance for your help.  I am pretty much a newbie.  Have 6 homes so far and still learning.