Conflicting advice regarding paperwork

[Susan Franco]

I am a newbie here, and am getting conflicting advice from others.I got the seller of a property to give me a signed "option to Purchase"agreement, however I am getting differing opinions that you first need a standard sales agreement Prior, before the option agreement. This makes no sense to me, because I am just getting the option to purchase the property.Actually this advice was from an attorney, but I don't think he was familiar with wholesaling. What is the normal paperwork, and what comes first?