Made by KTM in the 50's and imported by International Models. They were one of several different prototypes that were imported and available in both 2 and 3 rail versions. Repowering them is a fun project since the drive is at best problematic.
That one went pretty cheap given its company of 3 IMP freight cars; the re-org of eBay listings probably contributed to bidders not seeing it.
And, I already have too many ED144 shells laying about and will probably sell off another 2 or 3 just to reduce the clutter factor in my shop.