Are you getting ripped off buying on Amazon?

Consumers looking for the best deals on everything from clothing to TVs have been well trained to price-check online, often starting at e-commerce behemoth Amazon (AMZN), which trumpets its aim to match "the lowest prices." But beware.So-called "dynamic pricing" has long bedeviled travelers by jacking up the cost of air fares and hotel rooms, and now it's becoming common among online retailers. That technique, also known as surge pricing, could dramatically drive up the cost of items you want to