I have a used Bassballs Nano, priced for a quick sale at $20 (obo) shipped to the CONUS.
There is an issue with this pedal, it is producing some unwanted static/distortion and the dist switch is bent. Perhaps someone with some skills can troubleshoot it and fix it...or use the chassis for a custom pedal build.
Stock photo below, mine is used but this chassis really doesn't show much abuse other than the bent switch. http://www.ehx.com/assets/png640h/bassballs.png