What to put on on a wholesaling mail letter

[Richard Holzhauer]

Hey guys, 

Pretty soon i am going to start wholesaling by direct mail in my area (staten island) . Can somebody give a guild line or outline to how you write the letter. Is the follow up letter written the same exact way. Do different targets include different info. 

Also is it true people actually physically write letter on yellow paper mail them? or do you type them up. 

any input will help me get started 

Thanks,

Rich