I was wondering whether anyone regularly buys yarn on eBay (and whether you'd share with us what you've found).
I've had mixed results on eBay. The first time I bought yarn on eBay, I was dazzled by the yardage - over 1,000 yards for under $10. When it arrived, I realized I'd missed out on A LOT that I take for granted at yarn stores, such as the width and feel of the yarn and the fiber content. My first purchase ended up being 1,000 yards of very fine, almost dangerously rough acrylic. I've since used it a lot (1,000 yards!) in combination with other, softer yarns.
Another failed experience: a beautifully soft merino (I started paying more attention to the descriptions) that cost $8 for three 250 yard skeins. I started making a difficult curly scarf from the book "Scarf Style," which required short rows and size six needles. After what seemed like ages, I finally finished the scarf. I proudly sported the scarf ONCE and a friend quickly pointed out in disgust that the long curls looked like intestines - the color of the yarn was a dull flesh color that I hadn't noticed during my enthusiastic welcoming of the bargain yarn. Now, anything I make with this "flesh" yarn looks frightening next to my skin, as though I've developed a knitted growth on my body.
Ah, it feels better to share.