The different colors for the USB ports denote the type of USB port it is:
Yellow: Power port
Blue: USB 3.0 that is backward compatible to earlier versions (2.0 and 1.0)
Black: USB 2.0
With regard to the pricing issue. You should contact your Best Buy Store immediately, before the ad ends, produce your receipt.
9 years, 8 months ago
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Lenovo Product Expert