Every time I check my in-box, the wad of cash being offered for old iPhones seems to be growing. Right now it’s up to as much as $357 for a used 32GB iPhone 4–provided it’s in excellent condition. eBay’s Instant Sale arm will also give you its leg for an old iPhone 4 for today only. (Credit: Screenshot by Eric Mack/CNET) That’s the highest price being offered today–and apparently today only …
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