Given they stand to lose $60k if the sale collapses, I hardly think they are playing games. I'd investigate why they want (need) the extension and go from there, especially if it had no material effect on me. They may have simply been over confident in their ability to borrow and not considered what if they were declined. Perhaps they are in an industry particularly effected by COVID and whilst you say its all been transacted during the current crisis, things are changing daily. Whilst interest rates are at historical lows, I expect banks are puckering up tighter than a fish's backside at the moment with people employed in particular industries now seen as high risk. This will be an evolving landscape for some time to come.
You could argue that you may be worse off in a deteriorating market, thats true if the deal collapses, but as you said, you had 2 other offers after a single open home both of which were higher. Are you hoping to collapse the sale, keep the $60k and sell to one of the other higher bidders, thereby profiting on the collapsed sale? Your legal right to do so, but seriously? 60k is a huge chunk of coin to lose and could lead to all other sorts of issues for the buyer.
Is there a legal process to go through to collapse the sale? Will it cost you and is there any comeback from the purchasers? Does the collapse happen on the day after settlement or is there legislation that dictates what must be done.
Lots of questions to be considered


