The reason vintage items are so valuable is because they were created when they shouldn't have been. Speed sticks, Death Robes, Talismans. They all are overpowered and susceptible to exploitation.
I understand your frustration but they can only be handled by a trusted few, otherwise there will...
Backpacks were disabled due to item dupe risk, then re-enabled, where dupe exploits happened again.
With the server economy as it is, re-adding them would be a bad idea and would probably result in an eco reset..