eBay with dib-bid has the 3-in-1 Lightning (8-pin) / 30-Pin / Micro USB Noodle-Style Cable for $2.11 + $0 shipping = $2.11 shipped. Ships from Hong Kong. Has a 3-foot cable length and comes in a random color.
Newegg has the Rosewill RCW-572 10 ft. Cat6 Network Cable (White for $1.49 - $0.45 off with coupon code EMCPFWP72 = $1.04 with free shipping. 10-foot ethernet cable features strain relief and RJ45 connectors with clip protectors.
A4C has the Motorola SKN6414A High Speed HDMI to MicroHDMI Cable for $2.95. Add two to cart to reach $5.90 - $4.95 in cart = $0.95 with free shipping. Normally found for about $4 on the web. Excellent user reviews.
Newegg has the Coboc 10 ft. High Speed HDMI Cable for $5 - $2 off with coupon code EMCYTZT58933 [Exp 4/3] = $3 with free shipping. Features 10.2Gbps transfer rate with full HDCP and uncompressed audio/video support.