For sale is my Line 6 HX One. This offers the full set of approximately 250 Helix effects in one compact pedal, but only allows the use of one effect at a time.
It's very easy to use, with a well thought out UI. Editing, saving and recalling presets is simple. The Flux function allows you to switch between two sets of parameters for a loaded preset, which gives more flexibility the you might expect.
There's also a basic but effective tuner, accessible from the foot switches.
You can control it via MIDI, and also connect additional external foot switches, although I have never explored those features myself.
I used this as a single pedal for quite a few gigs where I just needed a chorus, distortion or octaver for one or two songs. Others use it as a replacement for several rarely used pedals on a larger board.
I was impressed enough by the Helix effects to upgrade to a HX Stomp, hence the sale.
In excellent condition. Supplied in box, with power supply. £170 including UK postage.