I'm not trying to be rude here, but do you genuinely feel that "Deepwebdrugs.com" is a top level domain, and that a domain as such, on its own can start at 1BTC? Perhaps it's just my personal experience with selling domains on here, but that seems tenfold too steep.
I actually think that would be a hot domain name and probably worth 1 BTC. Only problem is it wouldn't be good for a marketplace since it's on the normal internet. Perhaps someone could discuss dark web markets on that site though, and create a directory of which sites are best. A directory itself would become quite popular, only problem is the government will probably try shutting it down.