A used Chase Bliss Blooper Bottomless Looper pedal in Excellent condition with original box.  What a great pedal!

FROM CHASE BLISS:

The dream of blooper was to merge high-fidelity looping with creative manipulation, allowing you to steer recordings to new and extraordinary places. Sync, loop and layer, then edit your creation with two channels of immediate, hands-on modifiers. Save, come back later, and keep going.

Use Additive mode to record modifiers directly into your loop.  Save and transfer up to 16 loops with layers stored and separated.  8 layers of undo / redo for time jumps and carefree overdubbing.  Age and analog-ize your loops with the help of Stability.

In Additive mode, any modifications you make to a loop are recorded into your overdubs, like live editing. This includes knob movements – if you hear it, so does blooper. Cook up radical breaks and transitions in real-time, or loops that continuously evolve. Use the Layers control at any time to jump back to where you began.