I just grabbed a few more of these at Waldy tonight. A 4-pack (2 pair) goes for $1.28 where I live. So, 32 cents per. Strangely, the 6-pack (3 pair) goes for $1.97 - 32.83 cents per for those who care. It's just a hair more than the base cost of that auction you pointed to. But without the shipping, it more than makes up for it. They have loads of them laying about.

My local Chinese Conglomerate, er... Walla-Mart has clearance aisles and these things typically show up about the end of February when they get in the spring stuff. I've seen these 4-packs go for 50 cents and one time I snagged a boxful at $0.25 per 4-pack - yep, about 6 cents per warmer! If you get that deal, I recommend reselling them on eBay. <img src="/images/graemlins/smile.gif" alt="" />