nonnie do that. The sellers won't know how inept the agents are unless you tell them. They will be told that there has been no interest. Meanwhile, the sellers are waiting for an offer and you and god knows how many other people are waiting too, but the agents still get their fee.
When we sold our little house in the Borders, we contacted the agents to accept as soon as we received a satisfactory offer after a survey, then waited for them to ring us to say it was a done deal. And waited and waited. After two weeks the people who made the offer contacted us to ask whether they could come round and see us, which we gladly agreed to. Turned out they had been waiting too, to see whether their offer had been accepted, and worrying in case they had lost the house. They thought we were delaying, we thought they were delaying, while the agents did damn all. We fixed all the details ourselves over cups of coffee and a leisurely tour around for another look. They have now been happily settled in for four years, and have a dog, a cat and chickens.