Determining the # of letters to send out? Seller's list

[Craig Moore]

Hi BP,

I'm wondering how many direct mail letters I should send out during my campaign. What is an average number? What is too low? 1K? 2K? I'm $20k away from purchasing my first multi-family so it may not take more than 2 deals this year to get that.

How do I make a letter appeal to people looking to sell/know people who want to sell? Besides of course nailing away that this is all about them? Thanks for the advice