They are getting just as frustrated as you are, so don't lose sight of that. If they get too frustrated, they'll likely bail on you. You should know what the "typical" overage % is on offers in your area, and make sure they know that as well. Make sure they know that the listing price is like the auction reserve...and especially make sure they understand what is happening in the market that is causing all of this, why your area is or is not insulated from any sort of snap-back effect, etc.

From there, finesse your offers. Dont wait for offer review deadlines, dont "just" offer list price, cover appraisals (but then meet the appraiser at the house to help guide that valuation), get creative with how you present offers....but you have to make sure you have educated buyers.

Good luck.