Made an Offer (They Can't Refuse?)

I am on the edge of my seat in anticipation. I pace. I fidget. I cannot wait to hear how the seller reacts to my purchase offer. It went in this morning. One of the conditions of the offer was that they respond to me (either affirmative, negative or with a counter-offer) by end of business on Monday. So, I can't immagine that I will be very productive at work, but then again some days are like that.

So, if they accept my offer straight off I will worry that I offered too much. But then by the same token, if we negotiate too much then I'm afraid that I will go too high. I guess its all a balance.