Question about letter campaigns

[Nick Saucier]

The thought crossed my mind about letter campaigns that once you run a massive, targeted letter campaign.. you do some deals and maybe get paid some nice checks... But at that point, haven't you exhausted that entire population of people of deals. Wouldn't future letter campaigns be useless unless you targeted other areas?

I guess my question is, can you, as a successful wholesaler, ever "fish" a particular area dry of deals and have to move on to another? If not, how often do you do a letter campaign to the same area?