No, that is not normal. As the other agents have said all offers should be in writing with a good faith deposit and mortgage pre-approval, if applicable. If the sellers disclosure was available the agent should have forwarded you a copy and if there is no sellers disclosure the agent should have just told you that.
If you need further assistance please feel free to contact me. I lived in Manchester for several years therefore I am familiar with the area.
626 Route 9 South
Freehold, NJ 07728