Mine's coming off my 2006 P-bass this week. I've heard great things about what it did to the tone of a Jazz but on a P-bass the tonal switch is a bit lacklustre. That ebay link is £18, you can have mine for a tenner if you really want (assuming it's UK postage? - it may not be off until the weekend as I'm waiting on parts) but if you are hoping for new tones to be unlocked at your fingertips, I think you'll be disappointed.