the price i think depends on the area, here f2 or f3 wont bring much as they are way too small for most farmers. f2 are much easier to find salvage parts as all the parts do not interchange, but many do, several f2 running here , hardly any f3's JD 9500 s abound and being slowly replaced by the newer JD rotary combine, seeing lots of 30' headers too just a thoguht