If you enjoy not knowing which way is up, you'll love this. It's a super-tweakable sonic whirlpool machine that'll take you straight back into 60s psychedelia; drugs not included.

Model: Boss RT-20 Rotary Ensemble
Made: Taiwan, 2006 (serial ZU22140)
Type: rotary speaker
Power: standard 9v negative supply or AA batteries, not included
Switching: buffered bypass
Equivalent new street price (approx): n/a (discontinued)
Mods: none
Accessories: original box and manual
Condition notes: used, no major marks, fully functional. Overall: very good condition