From a recent purchase from these very classifieds, I have a very good condition Boss ODB-3 up for trade. Primarily, I am interested in a filter pedal. I am looking to build up a "noise board" for funsies and have a flanger on the way as of this writing. So, I think a filter is next up to add. I might be open to other modulation possibilities. Lacking a good trade, I could sell this thing for the $50 that I paid, which would then get me a cheapy filter pedal, but let's try the trade route first.