What are they thinking?

There are two skeins of Opal tiger sock yarn on ebay. Each of them has bids of over $30!!! Now, I do like Opal yarn. The times I have used it I like it and I do have some in my stash waiting for me. I also think that the "tiger striping" pattern that the yarn makes is really cool. But...to spend over $30. for one skein of Sock Yarn???

I don't get it...