I have bought a couple of knitting gadgets. They are a little out of the ordinary, making them blog-worthy. Of course, the Royal ball winder mounted on the top of the swift below is not unusual. I was lucky to find it at our guild's stash sale for $5. Once I had it, I was motivated to buy the squirrel-cage swift I had been wanting since I'd seen one in Taos last fall.
If you want one of these, they are available on line, in all forms. I bought mine at the Estes Park Fiber Festival, from this vendor. However, it actually came from this fellow, who has an Etsy shop. I messaged him through Etsy and got a quick response. I'm thinking of ordering the small yarn swift attachment that goes with this yarn holder.
There are all kinds of yarn holders available on line. I've even seen some made from plastic cd's rather than lazy susans. I ordered the swift from Kirtland's Yarn Barn. Their service was great. The swift was exactly what I wanted. It works, it sits in a very small space, and it is pretty. I just won't wind loosely-spun singles on it.