sorry for coming back to point something out,
your rarity scale is way off. you're not judging rarity, you're judging desire. An example of BC ef vs S/P/R. They are all obtainable from the same place, so their rarity should be the same. However, because there's more demand for the BC EF (according to your price chart), you set it to a higher rarity.
I'd suggest removing this portion of the table, or making an accurate scale.
(if you copied it from other dude, it's outdated, and long before zylon shop)