I've recently been getting a lot of emails asking for direct links to Etsy listings or Ebay auctions.
In general I don't like doing that because, lets be honest, it's just an advertisement. And, you know, I sell advertising here. At quite reasonable rates, I might add.
That said, I do make occasional exceptions for artists that I like. Someone who's been featured here a few times gets a bit of leeway, while an artist who's posted in-depth build logs or tutorials gets a whole lot of credit on my end. In either case I have no qualms about linking to pages that show off their work and just happen to have a link from there to a sales site. I want to promote artists that make cool stuff, but I don't want to become one of those sites that exists solely to hawk stuff.
On the other end of the spectrum there are a few artists, three at last count, that are forever banned from having any of their work appear here. All three of them made legal threats, something I take very seriously. All three were upset about things that "looked like" or was "similar" to their work. In all three cases I provided multiple examples of the same thing pre-dating their efforts by years, if not centuries. When that failed to soothe them I provided the address of my lawyer. Amazingly, he's still waiting for those legal papers to arrive.
One last thing. I'm an Amazon affiliate and occasionally recommend products. That means I get a cut of your purchase price, at no cost to you, whenever you buy through a link I provide. Sadly, at least from the standpoint of greed, most of the products I've linked to are less than $10, and less than $1 for the out-of-print books. I really do need to start cultivating more expensive, and marketable, tastes.