Here is a Bachmann 41-0821-L7 EMD GP-30 Demo #5639.
Features include:

all-wheel drive
5 pole skew-wound motor
super-quiet, helical cut gears
die-cast chassis
metal grab irons
directional headlights
RP25 wheel contours
E-Z Mate Mark II couplers

This item has been graded per TCA standards C-7: Excellent based on visual appearance. The overall appearance of this item may be improved with a gentle and thorough cleaning. This item appears to have been run, and displays overall signs of light previous use. There are light nicks and scratches on the surface of this item. Some of the rails are bent on the front of the item. The front headlight works but is dim. The wheels show signs of wear. The original paint is in great shape, and the unit displays excellent overall finish. The instruction manual is not included. The original box is included. Please check the photos for a detailed look at the item. Overall condition is Excellent.

Condition: Excellent (C-7)
Operational Status: Functional
Original Box: Yes (P-6)

Manufacturer: Bachmann
Model Number: 41-0821-l7
Road Name: Electro-Motive Division (EMD/EMDX)

Scale/Era: HO Scale
Model Type: Diesel Loco

The SKU for this item is 5944325.

Product Id: 12286328