pcRUSH offers the Canon imageCLASS Monochrome Printer, model no. MF216N, for $249.95. Apply coupon code "CANONMF216" at checkout to drop it to $99.95. With free shipping, that's the lowest total price we could find by $18. It features 24ppm print speed, 1200x1200 print resolution, and 9,600dpi scan resolution.
Note: It's not guaranteed for delivery by Christmas.