Thread:Garr9988/@comment-30644608-20170414145736/@comment-5782071-20170417040833

Well, canonically, Artie already checks auctions regularly and has almost been outbid a few times. I'm sure they look for strange looking objects first, objects likely owned by notable figures in history, and especially those with strange stories in their descriptions (people do sell "haunted objects" on there all the time, so they've gotta keep track of those even if they might be hoaxes, just in case). They automatically check out objects that are specifically said to have been connected to notable people and events, as they don't always go in museums (deck chairs from the Titanic, irl, is one example. And in the show, Mary Mallon's Butcher Knife was sold at a local auction rather than donated to a collection or museum).

Besides Artie, considering that Claudia runs the computers quite often I'm sure she checks shopping sites, or at least creates/improves/runs an automated searching program to do it for her.