Not trying to create any sort of bragging thread. My fiancee think's it's absolutely insane to spend close to $2,800 on the bass I want (5 string Valenti), and I'm generally curious to see what others have spent on their high end basses.
My current most expensive bass is a Classic Stingray 4. Retails new around $2,000.. I got it used for $1,220.
Tell her that it is insane that people spend thousands - if not tens of thousands - of dollars on diamonds for engagement rings and the like. It isn't like the diamonds are useful in any way other than to look at, and then when you consider that for a fraction of the price you can get a cubic zirconia that will look exactly the same to the vast majority of people, there just isn't any justifying diamonds at all.
My wife doesn't complain (much) about my basses, because it is a far, far cheaper hobby than when I was into fast exotic cars.