I'm not a pedal guy, but I know people who barter. I got these for fixing a guy's bass in lieu of payment.
BOSS OC-3, the Super Octave
It works fine. I put a battery in and it made all kinds of octavey noises. No problems as far as I can tell.
Sold locally on CL. Electro-Harmonix BIG MUFF PI
Also plugged it in and it seems to work fine. Made in the USA, for whatever that's worth!
Both are nasty looking. I have visions of a band comprised of avid golfers playing in full clubhouse regalia. But despite that, they work.
No boxes, no instructions, no power supply. $30 shipped (USA, PayPal).
PM with any questions, offers, comments, dirty pictures, etc.
Trades will be considered, but bear in mind... I'm not a pedal guy, so I'm not really into them.