A half pound bar of copper as a collectible? WTF? Has inflation really gotten this bad? I guess maybe someone might want one of these for a collector's item, but I can't figure out why. The last thing I'd want is to have to lug this thing around with my possessions or store it for all eternity. I guess maybe this is the sort of post that won't age well when hyperinflation hits, but I think at some point people need to have the value talk with themselves. Will this really have value in the future because it has a logo stamped onto it? I'm guessing most of these things will end up as paperweights or as a reminder to not shop online when you've been taking medication.
Without knowing the price of that item in particular, I would say that I buy things like that - for young relatives - nieces, nephews, ect. - to have for examples of say elemental Cu. The markings are of value - to them - because it may align with something they know. If I had that piece, I would gift it to my 6 yo nephew as an example of Cu, to get a feel for the density, to serve as a basis for inquiry and so on.