Online retailers are changing prices minute-by-minute

While shopping online recently, Amy Shoaff noticed prices for the same item, on the same website changed substantially throughout the day.

Amy discovered a growing new trend.   Some retailers are changing their online prices hour by hour, and sometimes even minute by minute!      
The goal is to have a product priced so it pops up as the lowest priced item in shopping search engines, or Amazon's coveted "buy box".   That's where most consumers look to find the best deals.
We worked with to monitor prices of several items on a well known shopping website. 
First-an iPad.  At midnight the iPad was $511. At 6am, it was $503.  By 7am, the price sunk to $475, where it remained until 2:30pm and then jumped to $510.  At 10pm, the iPad increased to a high of $529.   
That's a total of a $54 price difference -on the same site-all in one 24-hour period. 
Decide.Com's tracking software found the price of these colored pencils ranged from a high of $3.32 to $2.22 over a 24-hour period.
Duct tape: In one day the price ranged from a high of $7.83 to a low of $2.00.
Some retailers hire software companies to monitor the prices of its products and make changes based on its competitors.
There are websites which will monitor prices for items you want and alert you when the price drops, or reaches an amount you'd be willing to pay.  If you add an item to your amazon shopping cart and leave it there amazon will notify you of price changes. 
Amy has a warning about clicking on the least expensive deal found on search engines, though.
Free shipping, returns, make sure you're using those things to your advantage because sometimes just price isn't always the cheapest."
What product's prices fluctuate the most?  
Decide.Com says: Electronics, appliances, clothing, shoes, jewelry and even household staples, like dust pans ! 
Some experts suggest if you ordered something from a retailer and the price dropped within a reasonable amount of time, contact the business and see if they'll refund you the difference.
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