Listen, if you really need an old account, it’s hard to find one from 2015, but it’s possible. When I was looking, I realized that most sellers just put any year in the description, but the actual date doesn’t match. It’s safer to look where there are aged profiles with real dates - for example, here’s a 2015 Discord account buy
https://discord-accounts.com/en At least there, it’s clear what year it is and what’s included. Make sure the email is accessible and that the date in the profile itself matches the one listed. Start by buying just one, see how it holds up, and then think about the rest. If the account is genuinely old and hasn’t been restored, the moderators won’t touch it.