Here is a clean non-powered BNSF diesel GP-50 ph2 by Athearn. I have seen this shell on both powered and non-powered diesels.
This one is clean and has scale couplers on each end.
CONDITION: C-6+. Non-powered dummy unit. Metal railings installed. Some may need straightening. Upon close scrutiny, you can see some oxidation and surface rust on the handrails. Will clean up with a fine scale sandpaper if you want. With scale couplers. No box.