He messed me up by specifically mentioning Lynx Leather, but Epyon confirmed that both leathers drop off of OWNM 60.

I see that. Also removed this edit because i reread your statement about being stuck at 60 spaces and realized you weren't trying to get to 60 but to 65 which is GB part VII and does require lynx leather.

Yup, and the most 3 recent Lynx Leather sold were sold for 800,000 Gil

So total just to get to 65 is

Lynx Leather - 800,000
Adaman Ingot - 15,000
Rainbow Cloth - 19,000
Deathstone - 125,000

Total: 959,000 for 5 inventory spaces or 191,800 per space.

I'm all about the space, but more than 100,000 or 200,000 total for the upgrade and I start to be like ughh...

I have been at 60 for quite some time and while i'm always trying to make space it certainly works for this era. I always figured if i need something i'll farm it. Even it it takes a couple weeks on the OWNM.

Being a BST sucks for Equipment sets. Full CHR set, Full Melee Set, And then Dark Staff/Light Staff for mana if /whm not to mention if build an evasion set for when you pull aggro (Aka Raven Set)