A4C via eBay offers the 5-Foot 3.5mm Male-to-Male Auxiliary Cable 2-Pack in seven colors for $2.48. Add three 2-packs (six cables total) to your cart and the price falls to $3.72. With free shipping, that's $0.62 per cable, a low for this quantity by $12, and the best per unit price we've seen for 3.5mm cables with angled connectors and flat cables.