@VawX not really. The price in this manga is extremely inflated (57,450 yen for 100 grams). You can get a good 100 grams of A5 grade (highest grade) Wagyu for 5,000 yen, maybe a bit more. Even if we assume this is the most expensive cut and whatnot (which would likely be Kobe), I can't imagine it going much further beyond 10,000 yen for 100 grams, unless I'm missing something. So either this store owns the world's greatest, rarest Wagyu, imbued with God's genes, or this butcher is a scam artist.
oh man, she is a complete moron, now I feel absolutely terrible for her.
I feel like the chapter was written in advance though and he just cranked up the price of the meat.
Mistakes were made. (What a fitting translator group name for this chapter.) At least she realized her error rather quickly.
@Nosebleed No doubt the price is inflated by the exclusive members only service. One pays more simply because they're able to. It is easy to find products with a lot of, as we say over here, air in the price. Like Apple products, you pay premium simply because it is Apple.