unknown97 is the code for LDoN dungeon type, e.g. 3 is Mm, 4 is Ruj, etc.
unknown98 is the cost of the item in adventure points.
unknown99 is always 1 for these items. NOT SURE ABOUT WHAT IT'S USED FOR.
Note that some LDoN items that are not properly collected dont have this fields set.
LDoN sold items start at 42001
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