How expensive is dark matter?

Excuse me, but I was wondering if you could help me understand something about dark matter. I've heard a lot about it in the context of cosmology and astrophysics, but I've never really grasped the concept of how 'expensive' dark matter could be. Is there a tangible way to measure the cost or value of dark matter, or is this simply a metaphorical term used to describe its elusive nature and significance in the universe? I'm genuinely curious and would appreciate any clarification you can provide.