Why octave, when you can Super Octave? 

Model: Boss OC-3 Super Octave
Made: Taiwan, recent model
Serial: serial obscured
Type: octave
Power: standard 9v DC negative power supply or 9v battery (not included)
Equivalent new street price (approx): N/A
Mods: none
Accessories: none

Condition notes: used, no major marks. Tested and fully functional.
Overall: excellent condition