So, not only did I start knitting but I then discovered that like other interests there are "collectible" items. In the case of knitting there are books written by knitting designers that are out of print. So therefore they command big bucks. Alice Starmore immediately would come to mind of most knitters.
Although she is still alive and producing designs, some of her prior works are out of print and hard to get for anything close to what they originally sold for.
Yes I did surcumb and spent $$$ to obtain some of these works that I won't be good enough to try for quite awhile. But I do not see them going down in price so it is better to get what you want while you can.
Needless to say I have made some people selling on Ebay very happy.