here in PA, many times either the local forest service and or game dept, offers group bulk buy on fruit tree's, well all sorts of tree's
same goes for when local chapters of groups like NWTF, Pheasants forever, ducks umlimited
try contacting your local wildlife conservation officer, and chapters of above
most have spring dead lines, which up here , will be closeing up fast
but that is one place I have bought a lot of tree's over the yrs at great deals
been buying about 700 tree's a yr for past 10+ yrs
mostly oaks and pine's
I tend to buy fruit tree's that are much older, as many times these group buys, the tree's are pretty young!
but they do sell older / bigger too!
good luck and if you find any better deals please post us here!
also, many times these group buys, they offer tree spikes/fertilizer too at a discount!