Self-Repair feels so satisfying.

[HEC]

So speaking in a crafty way, you spent 3k~ gil, since crafters repair to 199%

You can't compare it like this though as to get 199% (-ish) status you'd need to use two dark matters in two repairs plus you need still to purchase (or exchange for GC seals - either way it's not free) the dark matters for repairs. Still - self repair was always cheaper and gil saving - I've never used NPC repairs. And this "Penny pinching" (which is actually 30 - 65% saving on each repair!) will add a lot over time ...