Here's my pragmatic synopsis;
- Kubicki's don't get much respect or even noticed by most bass players in Australia so it's going to be difficult to get many players to even pick it up off the shelf in the stores, try it an buy it. Most people who don't have direct experience of one aren't likely to pay $A2k for it at a distance. The market for non Fender-ish basses in Australia is very, very small. I know this very well 'cause I've seen the looks and got the questions when I pull out most of my instruments.
- green anything is a hard sell, and that Bahama Green isn't the greatest colour to my eyes. But St Patricks day is coming up so you might luck onto a drunk Irish bass player who likes Kubickis and has cash. Leprechauns, being shorter than the average person would likely appreciate the 32" scale.
- Many people couldn't care less who's owned an instrument before (I don't) and wouldn't pay a premium for that (I wouldn't). The exceptions are usually when someone seriously famous, eg McCartney, has owned it and then non bass playing collectors might show an interest and be willing to pony up the $. Stu Hamm is not really a 'name' except to some bass players.
- You can't even read his signature on the back. Now I beleive you that that's what it is, but your 4 yo sister could also have autographed it for all I really know.
- It's an FCS Kubicki, which automatically makes it a 'lesser' instrument in many Kubicki players eyes. I don't agree, but....
- Whaddya reckon a '72 Jazz with 'mojo' (wank) is going to sell for at the Bassplayer?
I'm sorry that your circumstances are such that you need the money, but even if you sell the K for the price you're asking (unlikely) what are you going to replace it with that's going to be as good an instrument? And mean you have money left in your pocket?
Find another way to make the money you need, keep the K, get over the 'Stu Hamm owned this' worship thing and play the damn bass and enjoy it even if it gets worn, bruised and bloodied in the process. From all your posts here about it, you obviously love it. I know from my own experience that selling an instrument you love because of a passing financial concern will be something you'll likely regret later. Looked at it from a longer perspective that age allows me, this too will pass.
If everything you've posted here about your K is not just youthful enthusiasm and you beleive and feel it, find another way to work out your personal situation without selling your bass. Should you just be looking for a change and rationalising that, I hope you find something else you enjoy as much as you have this instrument.