You receive the gift link instantly once you buy and can be applied to any region (it’s global gift).
Discord doesnt have cheap prices for nitro gift, they only have gift in USD, how this scammer sells I think it's clear, uses stolen cards, that's what you will get banned for. Also I have attached a link from Discord, there is all written down https://support.discord.com/hc/en-us/articles/4407269525911-Nitro-Localized-Pricing-FAQ Q: Do Nitro Gifts have localized pricing? A: Unfortunately, Nitro gifts will be charged in USD. Proof usd / euro price only gift