"Subject to" contracts vs Sales Purchase contracts

[Brandon Gamblin]

#1. Whats the difference between a regular sales/purchase contract as opposed to a "subject to" contract? I know "subject to" has to deal with properties with mortgages but in what situations do you use these contracts respectively?

#2. In wholesaling, can you still assign a "Subject To" contract to another investor? If so, how do you do it? Whats the process? I'm asking because I'm getting good leads on Pre - foreclosures and my goal is to wholesale them.

#3. Can you also assign a owner finance or lease purchase deal too?