Even if it’s not expensive, Is there a high quality item every serious enthusiast owns?
Or maybe it’s a highly prized holy grail item you’d give your right arm for.
Is there something you’ve had an eye on for a while and you’re just waiting for an excuse to treat yourself?
Photography. You’ll probably get a variety of answers, but I would venture that a fast, professional level prime (L lenses for us Canon shooters) would be the top vote.