Main with half 99 stats

So I have this main that I haven't been using for a year now, my cousin played on it a bit, it has 1 month negative membership, how much can I get for it?

EDIT: also have a pure, a bit poorish, 40 atk 83 str 20 def, also wondering how much I could get for it, haven't been on sythe for 4 years now )