Buyer’s Contract in South Carolina

[Mark A.]

I am looking to purchase real estate in Columbia SC.  I am an out of state investor.  I contacted an agent and explained to him what type of properties I would like, where i would like to purchase etc.  

Shortly thereafter he sends me an exclusivity contract.  I’ve worked with other agents in NJ and have never signed one of these before (nor even heard of anyone other than a seller signing such a document).  He is now saying that he cannot represent me in a transaction or even walk into a home unless i have signed the contract.

Is this something special in SC?

I’d appreciate any advice anyone can give me.

Mark