all right, i think i got something solid, after notice that skell armor was within 0x30 of the miranium address from maindata, i started to compare addresses. this should work since the base ptr is in maindata and that one is constant with the others:
View attachment 494443
[All Battle items]
580F0000 01DD0408
780F0000 00072BE8
400C0000 00000000 00000000
640F01C0 00000000 8193E009
400C0000 00000000 0000000C
640F01C0 00000000 8193E00A
400C0000 00000000 00000018
640F01C0 00000000 8193E00C
400C0000 00000000 00000024
640F01C0 00000000 8193E012
400C0000 00000000 00000030
640F01C0 00000000 8193E019
400C0000 00000000 0000003C
640F01C0 00000000 8193E01A
400C0000 00000000 00000048
640F01C0 00000000 8193E01B
400C0000 00000000 00000054
640F01C0 00000000 8193E01F
using items ids from here:
https://xenobladedata.github.io/xbx/bdat/common_local_us/ITM_BattleItem.html
the bottom 2 blank items are ids (26, 27) with can sold for 10 and 30 thousand and it actually sell like its normal.
(HOLY SHIT, where is the actual item, then?!)