Tanga offers the HBQ i7 Twins True Wireless Earphones in several colors (Black pictured) for $19.99 with free shipping . (Tillix via Amazon matches this.) That's tied with our mention from two weeks ago as the lowest price we've seen. (Outside of the below mention, it's a low by $5.) They feature 4-5 hours of play time, hands-free calling, and lag-free connections.

A close price: E-beginning via eBay (and other eBay sellers) offers them for $21.02 with free shipping.