At approximately $5,000 for the lot, that was a pretty good deal for someone, but also clearly shows that it's a site known to pipe and tobacco aficionados, so the competition is already there. Don't be too surprised if these turn up on tinbids.
If finding these sites is important then all one had to do is make the effort to find them. So I don't object to hoarding information in this instance, just as I didn't object to not sharing my Esoterica sources, though that was at the request of the stores, since they didn't want to be badgered with phone calls.
Bottom line is, people are finding this stuff and bidding on it, so the sites aren't exactly hiding, which also makes sense, since it would be counterproductive to their business success.
Go looking for auction sites and thee will find them.