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?
A good quality micrometer. Some will go for the classic Starett, others will get a modern digital Mitutoyo. Doesn’t matter if it’s a lathe or mill guy, CNC or manual. Any decent machinist will have their mic.