Just a quick list I made from some of the more popular gachas I play for reference to educate the normies here who "think" this is some unprecedented absurdly high price kek:
Azur lane
Static PNG $14-15 L2D $20
PGR
Normal skins $10-40 depending on skin Also has skin gachas for best stuff that can cost well over $100 if unlucky
Arknights
Static PNG $10 L2D $15
Alchemy stars
Normal skins $15 Skin gacha $50+
Genshin
$20 - 30
Tower of Fantasy
Has a few old skins for $15, nothing has been added to this list since launch. Everything else is either from season pass or the $100+ skin gacha
Counter Side
$18 - 25