I'm not a Micarta guy, and I agree the scales look a tad worse in the video you took compared to the sales thread where it was posted. I really think this is a trivial difference, but I guess for some it is worse for others. I thought people bought knives described as 'users' so they could USE them, not flip them for a big profit, but I'm not one to judge.
What I see as a problem is that you took the knife apart and tried to fit a different blade to it, then resell it for quite a bit more (not judging, just observing) and then took it down when it wasn't selling. ONLY THEN did you open a paypal dispute with the seller, claiming you didn't get the knife you thought you were getting. I understand that IF the seller did in fact use some form of cover-up for the micarta that wore off over time, that it would take a while for you to realize it was not in as good a shape as you thought it was. BUT, you did try to modify it, and then sell it, and THEN you came to the seller with a complaint.
Whether or not the knife was as described, you basically made it your own by tinkering with it and then attempting to sell it. I don't think the seller is liable for anything now that you've done that, and the more you talk about it the more you're repeating yourself, which isn't really helping your case.
Forum rules dictate that the knife is yours now, I suggest you make it yours and, if you don't want it, try reselling it for what you got it for, not $90 more.