B&H Photo Video offers the Apple Watch Nike+ Series 3 GPS + Cellular 42mm Smartwatch in Crimson/Black for $284 with free shipping. That's $15 under last week's mention and the lowest price we've seen for a new cellular-enabled model. (It's the best deal we could find now by $75.) It includes a screen protector and features:

W2 dual-core processor

16GB internal storage

integrated GPS and GLONASS

watchOS 4.0

Note: It ships in one to three business days and may not arrive before Christmas.