With orders of $25 or more, Joy in Shop via Amazon offers the Simply Genius LED Light Up Christmas Bulb Necklace for $5.95 with free shipping. That's tied with last week's mention and is the lowest price we could find now from a US-based seller by $2. It features three lighting modes and measures 40.5".

Don't need it right away? all-accessories-4u via eBay has a similar item for $2.99 with free shipping. It ships from China and may take two to seven weeks to arrive.

Note: This item is offered as part of Amazon's "add-on program" and can only be purchased with an order of $25 or more.

Update: It's no longer part of the "add-on program".