feels like all the packs you're iso are 50 cents or more in irl money, seeing as how 100 fg is basically equivalent to $1. that makes all these packs 50fg or more.
just because you want to open them for rare cards doesnt make them any less valuable, neither does the lack of buyers as there are other places these packs can be sold.
20fg is 20 cents a pack, meaning 30-40 cents a pack cheaper then the irl price.
but even say that lack of buyers and lack of interest in packs does effect price, at 20 fg a pack you're still getting a like %50-60 discount.
I'd honestly be surprised if anyone sold them cheaper on here.
that all being said.. i wish you luck!