If you're looking at this, then you probably know what a great multi-effects unit the Boss ME-50 is. My unit has multiple scratches and some dust around the knobs, but is in full working condition and comes with a third party power adapter (nearly new).

The ME-50 Guitar Multiple Effects is a floor-based multi-effects processor built with the ruggedness and simplicity of a stompbox. Designed to work with your amplifier, the ME-50 focuses on killer multi-effects (like COSM overdrive and distortion) rather than amp modelling. And dialling in your tone is easy, thanks to dedicated knobs for each effect section, three footswitches and a built-in expression pedal. So if you want great-sounding effects without all the menu surfing, the ME-50 is everything you need.

• Floor-based multi-effects processor with BOSS' most intuitive interface ever (at the time);
• 30 Preset Patches including delay, modulation, reverb, compressor and more;
• Killer COSM overdrive/distortion effects including "Square" synth sound;
• Dedicated knobs for each effect section - no menus to navigate!;
• Tone Modify function offers Preset EQ settings for quick tone editing;
• 3 footswitches for switching effects on and off with a single stomp;
• Onboard expression pedal pre-routed to 6 modulation options or volume; and
• Rugged metal case with clear panel layout.

I'm sorry I don't have the original box or instruction manual, but you can download this online.

Overseas buyers: Please note the current power adapter is a 3-pronged UK one, so you will need to get one that fits your sockets (easily sourced online). Alternatively you can run it on batteries (not supplied).