To be sure, I have and have seen rock solid authentic ones that look strikingly similar. This is either a very good fake or the real deal - I just can't be sure!
Can you take an even higher resolution image and save it without the JPG distortion? I see a couple of things that need to be checked out. I need to see it closer up, including the N of Jackson.
Yeah. I might just list it at cost with the caveat that I dont know if its real or not. Perhaps thats why nobody is commenting - its a bona fide head scratcher.