PNC in 1st position waited until the 11th hour to tell me they want 20% more than the offer price.  Our market has exploded in the last few months - which happened after getting the offer that has been in waiting all this time - so it's not totally out of the question that I pull a crazy offer out of my hat.  But the foreclosure day is next week, and they claim they won't consider a postponement until 72 hours prior (which falls on this weekend so I'll try calling tomorrow and Friday to postpone).  But they also say they won't postpone the auction date unless I've got a compelling reason - ie, a new offer.  Then they say they would need time to review any new offer, and we have no time.

Any suggestions how to buy more time?  Or another "compelling reason"?  Or other means of escalating at PNC?