Clayton,
IMO there is a benefit to buying a place that already has a pond and it is that you definitively know it will hold water assuming you check history as FireIsHot suggests. Whereas, you can do some research including having the NRCS come visit the property that doesn't have a pond and come to a reasonable conclusion that it may or may not but I don't know if that is definitive.
Good Luck!
1 ac pond LMB, BG, RES, CC
