I saw so many going for cheap and passed em by because Im not big on getting things that are kinda sort of redundant. I would just buy one and call it a day, but I would feel weird to do so until I'm able to sell this one.
Heck my last resort is to take a loss, and sell it to MPCstuff.
The 2500 is pettit compared to the 4k, that thing is like a tank. only heavier. If you want portability then stick with the 1K or a studio/element controller.