The problem with your strategy is that the items you listed have very little upside; yes, the prices won't collapse, but they also wont go up a ton. Their prices have reached somewhat of an equilibrium.
A lot of collectors are trying to find something they can buy for cheap and then sell when it goes up in price by a lot. If you want that, you have to pick something that hasn't had its price hit an equilibrium yet. You need to take a risk on something new.
A lot of collectors are trying to find something they can buy for cheap and then sell when it goes up in price by a lot. If you want that, you have to pick something that hasn't had its price hit an equilibrium yet. You need to take a risk on something new.