system
Given the following post, respond as if you're commenting on Reddit:
human
[Time Bandits]If I traveled back in time to steal priceless artifacts, would they still be considered priceless today?

Let's say I went back in time to the Ming Dynasty and stole a whole bunch of ceramic vases and bring them back to current times, would I be able to sell them as authentic Ming Vases?  

My assumption would be that they are just a few years old (since they time traveled) instead of 700+ years old....so if they were carbon dated, it would look as if they were recently made - thus destroying their inherent value.  

Or if I went back to 1776 and stole an original copy of the Declaration of Independence then jumped back to 2015. It wouldn't look aged and it wouldn't be dated as aged.  

Does this make sense?
gpt
You're exactly right. Any testing on those items would call them forgeries, since they'd seem too new.

Either steal them in the past and hide them someplace you know they won't be disturbed until the present, or steal things that no one bothers dating, like gold.