Cygolite HLMT-DCV6 helmet mount, new in the package. I recently bought this but haven’t used it, and the new light I just got came with the mount. Works with Expilion, Metro, Streak, Pace Systems. $10.
Topeak Hexus II multitool, new in box. I got this as a gift but already have one (as well as an Alien II; I carry the Hexus all the time, the Alien is a bit bulky). Anyways, I don’t need a third multitool and would rather give someone the few bucks off it would cost me to ship it back. $15.
$20 – Detours Toocan utility pannier (black). Includes a clip-on shoulder strap and rain cover. Decent capacity with a lot of pockets inside, it’s heavy quilted material and a thick rubber bottom. The mounting system on mine is a little different than the one in the review, it uses black plastic clips and there are inserts if you have a thinner rack. As in the review, I think the mounts could be better since they don’t really “grab” the rack. I used a bungee attached to the handle to keep it from bouncing around.
$20 – Instep ride-n-run trailer. I’ve had this for 10+ years but only used it to haul stuff a handful of times. The hitch receiver mounts with the QR skewer and the hitch attaches to that. You can also remove the hitch and install a wheel (included) and push it. It’s a bit dirty but otherwise in good shape.