It's been installed once, but the bass has never been "played out". Think of it as more of an art project. Besides, I'm really just a hobbyist, not part of any gigging/touring situation.
However, your question prompted me to check out the current prices for a black BT7. I see their price has dropped to $65, so I'm gonna drop mine to $60. After all, it may be in mint condition, it's still technically "used".