They look fake to me, the jumpmans leg looks too close to the patent leather but that could just be the angle and ball doesn't line up with the 23 but that could just be cause of creasing
Unless they're going for 3,000 or up they're fake, Oregon duck 5's are one of the better fakes made along with the 4's and I would never spend that much money unless I 100% know they are authentic and are from a well know consignment store or seller
Most pe's are made in a size 9 just because they are but these shoes are clearly fake. The netting is off and only a dumbass would sell them for 800, so even I can tell they are fake with ease and agree with @TIMMYBRIXXX
These look ok because the 3-m looks like it should and it is not as bright as usual 3-m but you definitely need more opinions because I'm no expert but I've seen fakes of these and yours look more legit than fake.