This is worth it just for the 'S Bend' mode, which allows you to bend a note up a couple of octaves using the footswitch as a momentary portamento masher. But, it also does a bunch of fun harmony stuff as well as the octave up/down thing. Covers heaps of ground and delivers heaps of fun.

Model: Boss PS-6 Harmonist
Made in: Taiwan, Aug 2015 (serial D7F9602)
Type: Octave
Power: regular 9v supply
Equivalent new street price (approx): $239aud
Mods: none
Accessories: original box or manual
Condition notes: used, no major marks, fully functional. Overall: excellent condition