(footnote: they don't believe in email. so it wasn't an option.)THE SOLUTION:After spending the evening thinking it over, I figured I could offer a less "daunting" offer by presenting an "Option to Purchase" contract instead of a blatant "Purchase and Sale agreement with assignment clause", which would leave them locked in with me for 30 days.The difference in these two contracts (from my understanding), is that an "Option to purchase" contract would allow the seller to still sell the property to whomever they wanted, while I would also simultaneously be able to market the home at 0 cost to them for 30 days.If a buyer approached them with an offer that was higher than the one in my option contract, they would give me the opportunity to "match the offer", or I could simply walk away from the deal and they could go with the higher price.THE FAIL: As I was fighting traffic demons to get to their property by 3PM, I gave them a call to let the seller know I'll be there soon.

Is there a way to fight to get our money that is due to us?  

Fighting robbers is not smart, and you should probably formulate a written policy for the future.Your attorney will have your back, and will make sure you don't say anything egregious, but you definitely don't want to hide. 

However, if they put up a fight, you're better off trying to negotiate a split than anything else.

But if they fight you, you will have to foreclose.  

I've done hundreds.Mark,Great insight shared above, thank you.Now, as an exercise, a hypothetical question that might help someone in the OP positions: if the OP (buyer) were to loan the heir (unprobated heir seller) a personal loan with a security guarantee of her interest in the unprobated estate (including the real estate) and then filed the personal loan in a UCC filing and also against the persons credit and filed a notice against the property with such claim guarantee then would that proactive action help the buyer to fight off potential other investors who maybe circling the wagon?

She can hire an attorney to fight or delay it, but eventually it will occur if no payment is made.

Hahaha, they probably won't but ya never know.....depends on the inspector and if he had a fight with his wife that morning.... :-)Also, if you get a negative inspection that you don't agree with, you can always attempt to override it by going over the inspector's head to whoever's in charge of the building dept.

It may take more than 800$ of your time and energy to fight it.

However as noted above you can hire 5 different surveyors to do the same job and you will have 5 monuments within inches of each other it is very common that survey's don't align If this is a resi lot where a fence a a few inchs one way or the other does not matter not worth all the expense to fight over a tiny amount of land just come to an agreement with the neighbor and move on..