No. I'm a tight-wad. The only time I buy something is if I run out of it, or I've spent too long trying to fix it when it broke.
My last bass lasted 25 years and after 2 years of saying there's nothing wrong with it, I bit the bullet and bought a new one.
I find feeling down is fixed with exercise and company, ideally both at the same time. Obviously not everyone can exercise, but a walk with the dog is good enough. Although, as I've never been depressed, it's easy for me to say.