!!!SOLD!!!! G Lab bass Wowee Wah, the best bass wah I've ever come across, and I've tried/owned most all of them. Doesn't suck your tone when turned on, still plenty of lows. Here's a demo from Marlowedk putting one through its paces.
G-labs Bass Wowee wah pedal review - YouTube
These sell for a bit over two hundred bucks, offering mine for $150, or trade for a nice delay/looper, or possibly a Markbass compressore with power supply. Velcro on the bottom, pretty sure I still have the original box, and unit is in very good condition and works flawlessly. Check the video, he does a pretty good job of showing all it's features.
thanks for looking.