Boss ME-80 multi-effects unit. This guy is the latest version of the popular Boss ME-50. The ME-50 gained a lot of fans owing to a simple, knob-driven interface, and this shares that same simplicity. Boss have added a stack of super handy features into this one though: amp modelling, USB audio out for recording, manual mode and bank mode where you store a bunch of presets for songs and some handy dual footswitches. If you're looking for a light and portable, battery powered floor unit that you don't have to be a rocket scientist to pull a tidy tone from, this is a great option. 

Model: Boss ME-80
Made: Taiwan, Dec 2013 (Serial: Z7D2791)
Type: Multi-FX
Power: 9v DC supply (not included), optionally runs on batteries
Equivalent new street price (approx): $570
Mods: none
Accessories: none
Condition notes: used, very minor marks only, excellent condition