AustinStore2002 via eBay offers the Hot Fashion Qi Wireless Charger in 12 colors for $2.64 with free shipping. That's tied with last week's mention and the lowest total price we've seen. (It's a current low by $5, outside of other eBay sellers.) It's compatible with most Qi-enabled devices and features a charging status LED indicator.
Note that this item ships from mainland China and should arrive in three to six weeks.