Mianheng via eBay offers the Xiaomi USB Portable LED Light in four colors (White pictured) for 76 cents with free shipping. That's a few cents under May mention and the lowest total price we've seen. (It's the best deal now by $2, outside of other eBay sellers.)
Of note, this item is priced at 99 cents Canadian, and the exchange rate to U.S. dollars may vary at final checkout. Expect two to three weeks for delivery.