Let's go back to Econ 101: When you constrict the supply of an item and have constant or increasing demand, price must increase.

FORBES: How Ethanol Hurts Starbucks

Or the toothpaste, medical supply or pawned item for that matter.

FORBES: Facebook, DVR And Solving The Ad Conundrum

Developed by Hannes Harms, a design engineering student at the Royal College of Art in London, these little markers would allow consumers to trace the entire supply chain behind every item in their cupboard, while feeding valuable nutritional information to dieters or people with particularly dangerous food allergies.

ENGADGET: NutriSmart prototype embeds RFID tags directly within food, traces your lunch from start to finish (video)

The PC power supply is probably the most failure-prone item in a personal computer.

FORBES: Perfect Power: Clean Energy's Killer App

Though Apple doesn't have an official presence at CES, the iPhone accessory was a popular item on the show floor, There was a neverending supply of cheap cases, covers, Bluetooth keyboards, power packs and charging stations for iPhone and iPads.

CNN: 6 trends we saw at CES 2013