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IP(v4) addresses are very expensive so that's unlikely to happen.

Sharing/rotating from a pool of IPs: sure.

Dedicated IP that no one has used: extremely unlikely and, if possible, very expensive.

You can get a dedicated IP from Digital Ocean that isn't shared with others.

Which is very likely used before.

rotating ips will be fine as well. which one gives such feature?

Not a VPN but with some ISPs you can change your IP whenever you want by spoofing your MAC address...

Don't really think so.

Does Such a VPN Exists?