Power of Sale 80% Rule?!?!

[Mike Smith]

I am in the process of purchasing an off market home in which the owned is deceased (in Ohio). The son is the executor and there are multiple siblings involved. We are working with his probate attorney to get the purchase agreement signed. They have verbally agreed to our offer price. Today, the attorney asked me whether or not the offer was at least 80% of current market value. Can someone explain why this matters? I did a quick google search and see comments relating to Power of Sale (sounds like it bypasses the probate approval process) and that it must be 80% (or more) of market value. The ARV is $150k and we are purchasing for $50k. It needs a significant amount of work (including foundation repair). We are estimating $60k in repairs. If if doesn't hit the 80% threshold is there a way to bypass? Does it just mean that it must go thru probate fully before it can be sold? Any help would be greatly appreciated!