As one of its daily deals, THAT Daily Deal offers the Star Wars Small Dog Collar
in Darth Vader (pictured), R2D2, or Chewie for $5.99
for shipping. That's tied with our mention from three weeks ago and the lowest total price we could find now by $2. It's available in size S (5/8" wide and adjustable to 12"). Deal ends April 11.
Note that size M is available for $1 more, and L for $1.99 more.