What would you sacrifice for zero money down?

[Stephen Groves]

Multiple of my recent seller financed deals have allowed me the opportunity to put zero money down.  I have had better luck negotiating zero money down with the seller than I have had negotiating a lower price point.  In short, I am willing to pay market value for the property in exchange for putting zero of my own cash into the deal.  I have taken deals in which I have very small, or zero, cash flow after financing.  I have cash reserves for unexpected cap ex's and am playing the long game on these properties, planning to make my money either once the mortgage is paid off or during the sale of the property.  

How valuable is having zero of your own money invested in the deal?  What concessions in other areas would you make to have the option to put no money down?