Like you said, it comes with a bunch of archived posts that already proved to be not worth the cost of a territory. 

Now, it certainly could be the case that a particular archive is valued by a buyer. My suggestion would be to auction off the archived territories, but don't let the buyers delete the archives.

What makes an used territory worse than a new territory?

_kind of fishing for your econ experience_

Good point, maybe you need to offer a discount to unarchive a territory, since it's used.