What would the basic process be like

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Lets say I had the following deal lined up:

Potential buyer lets me know what they are looking for and I already have an idea where to look. I send out a few dozen post cards and get a potential seller that has a property they just simply need to get out of due to pending foreclosure.

Could someone walk me through the (abbreviated) process from the point of getting an agreement of sale from the seller to assigning the contract to my buyer ?

thanks in advance.