Can I have an Agent get a property into a preliminary contract?

[Mike Miller]

An agent brought me an off-market property. I'd say it's a 60% chance the seller is not serious. So I don't want to unnecessarily introduce my investor to this agent unless it's serious. 

I can't do a generic wholesale contract, since it's not seller-buyer direct, there's an agent. And the new California Association of Realtors form does not allow assignees. 

So that said, how can I get some type of preliminary contract to ensure the seller is fairly serious? I am not looking to execute anything yet or go into escrow. Just want to make sure they are willing to take a $800K all-cash offer, before I bring it to my investor. Would I ask the agent to submit a normal C.A.R. purchase agreement form to the seller for $800K and use an LLC name as the buyer name? Not sure...