Go craft a Legendary Rune, prices have already quadrupled

Free legendary relic for one (1) legenary rune.

Where do you take the old price from? Legy runes were not on 200 Gold. Gw2e currently calculates 838g for a rune.

Unid greens are already at 3+ silver, charms are closing in on 5g,

Yes but charms are less then 50% of the price atm. 360 gold. So even if those have quadrupled the end price has not.

Now I'm wondering if I should wait until midway left to do it, to see if prices come down and stabilize.