Spigen Inc via eBay offers a selection of its iPhone 6 and iPhone 6 Plus cases from $15.99 with free shipping, as indicated below. Each design comes in four to seven colors. The deals:

• Spigen 5.5" Ultra Hybrid Series Air Cushion Bumper Case for iPhone 6 Plus for $15.99 (Metal Slate pictured, $9 off)
• Spigen 4.7" Neo Hybrid Series Slim Non-Slip Case for iPhone 6 for $19.99 ($15 off)
• Spigen 5.5" Neo Hybrid Series Dual-Layer Case for iPhone 6 Plus for $21.99 ($13 off)
• Spigen 4.7" Neo Hybrid Ex Series Air Cushion Bumper Case for iPhone 6 for $23.99 ($11 off)