Source do innovative stuff, this does a whole heap of awesome sounds. Squarewave sounds, wacky octave stuff... if you can figure out driving it, there's a whole heap of fun to be had here. 

Model: Source Audio C4 Synth
Made: China, recent model (serial 0000311377090)
Type: synth
Power: standard 9v negative supply, not included
Switching: true bypass
Equivalent new street price (approx): $420aud
Mods: none
Accessories: original box and manual
Condition notes: used, no major marks, fully functional. Overall: excellent condition