Hey man, for a music server I'd think about it from a practical side first. Older profiles usually look more trustworthy to new members and are less likely to trigger the anti-spam filters, so they work well for moderators and test roles. The main thing is to check what you actually get: how old the account is, whether email is attached, how the login details are handed over and whether there's replacement or support after the sale. If you want to buy aged discord accounts, this page has a decent overview of what's included in each offer so you can compare before paying
https://discord-accounts.com/en . I'd also change all the credentials right away and keep everything within Discord's rules so you don't lose access later.