Best Buy could become the latest retailer to offer customers a trade-in option for a new iPhone, but according to recently obtained documents, it could run for just seven days.
Techno Buffalo reports the big-box electronics retailer will offer customers a $100 credit that must be used towards a new iPhone 5C or 5S smartphone when "any working smartphone" is traded in. For that going rate, customers could walk out of the store with an iPhone 5C without putting any money down.
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The document reads: "From Sunday, Oct. 13 through Oct. 19, customers will get a minimum $100 Best Buy Gift Card when they trade in any working smartphone and purchase the iPhone 5S or iPhone 5C with 2-year activation."

If the document stands true, the offer will start two days early — on Friday — for the iPhone 5C.
Best Buy has not yet responded to a request for comment.
In late August, Apple launched a trade-in program for previous models. To take advantage of the offer, users had to bring in existing devices and were awarded credit based on the condition and model. Customers were required to use the credit toward a new iPhone before leaving the store.
This sparked a wave of companies from Walmart and Target to follow suit with similar programs.
Image: Mashable, Nina Frazier; TechnoBuffalo