Dare I say that buying a double bass is a greater commitment, emotionally and financially, than a BG? OK OK, but you get my drift perhaps. I well remember the time I got each of my basses, the excitement, the anticipation and sometimes the disappointment. And the 'journey' with each; the gigs, the highs, the lows.
And I remember the frisson of anticipation as I went to collect my Upton at Birmingham Airport after it flew over from US, admiring it, feeling it and playing the first notes. And then getting used to playing it and the gigs. And now it's for sale. I really have too many and there's no unique need for it. It'll be sad when it goes but it's better for someone else to enjoy it rather than be stored in the house not doing much.