If you’re trying to determine “value”, you’ll never get there.
This high-end audio hobby is a small niche market. To cover time, effort, costs included R&D, markups are required.
In this copycat world, cable manufacturers do not give away their secret sauce to their competitors. We consumers are left in the dark also.
So all we have is understanding up to a point, then must evaluate increased sonics at a price - an often fuzzy subjective process.
Finally, seems most have benefited from upgrading their power cables, at least to the next level costing <1k. Maybe try one on loan for free, or buy used and if unsatisfactory sell it afterwards. Be very cautious to avoid buying “fake” used cables.