It used to work that way, but people abused it to specifically avoid dungeons that they didn't want to do (requires a bit of foresight).

In case you missed it, i170 gear that used to be purchased with law tomes can now be purchased with centurio seals from Yolaine in the Forgotten Knight for very low prices:
weapons - 140 seals
chest/legs - 120 seals
head/hands/feet - 70 seals
accessories - 55 seals

The items to upgrade i170 to i180 were also severely reduced in price. They now cost 60 (weapon), 50 (armor), and 25 (accessories). Should be able to continue gearing up pretty quickly either with centurio seals on hand or by completing a few marks/ hunts.