found owner selling condo in Queens, now what?

[Jose Torres]

I'm in the "Find & Refer" mode of my RE career. This might be a dumb question but now what? What questions or what info do I gather from the owners to determine if this is a good lead? good investment? It won't be for myself just looking to refer it. Is there a book or article anyone can point me to as far as the conversation one has with perspective owners to determine investment opportunity? Thanks.