It's good, it's very good.
"Tomorrow I will have an offer coming in, but I am doing you a favor, you make an offer, you get the house today, you pay this price, check out the comparibles... you are getting a good price on this house" you made the offer, accepted, got the house, you are happy, you are smart, seller is happy, agent is happy. Win win win situation, isn't it?
But do you really know if there is an offer coming in tomorrow?