For a seller who has a house in the market for quite a while, it's exhilerating to get a call telling you that someone is making an offer. You go through a series of emotions - intitially you feel ecstatic, the next moment when everything sets in, you start to worry thinking that the offer may may not be as good as you were hoping for.
Agents usually don't tell you the price offer over the phone because there are other things to consider aside from the price - contingencies, seller concessions and real property requests.
Don't stop at the price. Look at the rest of the offer. Focus on how much net you're going to get.
Your agent should be able to explain to you the parts of the contract. But it's better if you already have prior knowledge about real estate contracts. They could vary depending on your state but generally they should be similar.
Here are the basic parts you can expect in a contract: