eBay offers the iKross LED Book Light for $6.99 with free shipping. That's the lowest total price we could find by $2. It features a flexible neck and can be used with normal books or eReaders. It requires three AAA batteries (not included).
Best Choice Products via eBay offers this Beginners Acoustic Guitar Starter Kit in Black for $34.95 with free shipping. That's $40 off list and the lowest total price we could find, although it was $5 less in September. This set includes a 38" acoustic guitar, case, strap, tuner, extra strings, and pick.
Note: It's not guaranteed for delivery by Christmas.