Monolith by Monoprice THX 887 desktop amp. Excellent condition - comes with power cable and box (box is beat up a bit, but still solid). Lots of power and plenty of input/output options. I’ve switched to a more mobile set-up, so it’s not getting much use. Price includes shipping and fees.
Also looking for TGXear Serratus, RikuBuds, and Venture Electronics earbuds.