How do i strcture a Basic Letter Of Intent?

[Sjalin Lathan-Sims]

I have heard that sending a letter of intent after speaking with a seller will increase your results.

how is this structured?

also, because im sending them a blind offer without out knowing what condition the home is in, will i be needing to change my number after i do know the ARV? will this upset the seller? any and all help would be great. Thanks!