100 million is cheap in my view in fact. It takes more than 50 rl hours to collect the mats to attempt to craft one - even without the op mat, and if get a fail double that, and if 2 fails triple it.
I was charged for 1 vendice: 16 madakoo pelvis, 16 Bukah grips, Rippa and Wikkah mats, other hunt and supreme dug mats and 6 hours of recipe time. I have thus far - actual count - killed Bukah 10 times, and got a total of only 3 grip mats from the 10 kills - so u can see from that alone how the collection of 33 mats per try for a top sword can take 50 and more rl hours. We have to find things up, then be first to kill, be lucky to get right drop, then get only a fraction of mats needed to fill one of the four slots over and over. Crafting is broken as when the system and only 80% "success" at lvl 250 was developed named and bosses weren't on timers. It is an insane investment of time to make one item now even without fails.
100 million = 10k grind mats at 10k a mat. 200 mats an hr x 50 hrs = 10k mats, so while the crafter is running all over Atys over and over - and x 2 if get a fail, u could earn 200 million.