4SurplusCity via eBay offers the refurbished Logitech Pure-Fi Express Plus Speaker Dock for iPod or iPhone in Black, model no. 980-000187, for $23.99 with free shipping. That's the lowest total price we could find by $9 for a refurb. Compatible with most iPod and iPhone models, this dock features a wireless remote, LED alarm clock, 3.5mm auxiliary input, and AC adapter.
Note: A 30-day warranty applies, but it's unclear who backs it.