buying or selling "on terms"

[William MacBride]

I heard that Joe Crump guy say that his favorite method of buying properties at or close to market value is to buy and then sell them "on terms." This somehow allows you to profit even though you put close to market value into the property. and you don't risk much money somehow. He just mentioned this though, and didn't go into much detail. Does anybody know what he's talking about?

Will