I apologise for bringing up a much discussed subject but I am new here. Where are Jaco's main basses?
Check this out: http://perso.wanadoo.es/fcjavierrubio/index_3.html
and this too: http://www.gbase.com/Stores/Gear/GearDetails.aspx?Item=1918411
Both of Jaco's basses, the two he played on records and tours, are in NYC. The fretted, after being sold via eBay, is now in the hands of a NY collector involved in the music business.
The fretless is at the heart of a lawsuit, and in the hands of a business owner as well. http://www.bassplayer.com/article/jacos-1962-fender/mar-08/34267