IMO the DF-2 is not a very usable distortion. The pedal sounds more like the PW-2 with a feed back option. But someone collecting will pay more for the Distortion & Feedback version. I paid $65.00 for a Feedback & Distortion about 1 1/2 years ago when prices were up higher than they are now.
I picked up a Distortion & Feedbacker not too long ago for �42. (No box or papers) I really quite liked the distortion from this pedal. The feedback option had me messing around with it for ages. I have a MIT DS-1, and way prefer the distortion on the DF-2.
I don�t like the distortion from DF-2, DS-1 is (to my ears) much better. But the feedback thing is very nice to play around with, too bad one can�t use it without distortion�