Old Gmail accounts have already been established, meaning that they have a history and are more trustworthy to Google. When you create a new Gmail account, it takes time to build up a reputation and trust. With old Gmail accounts, the process is already complete, so using them can save you time and effort. Furthermore, many email providers block emails sent from newly created email addresses, so using old Gmail accounts can help you avoid this issue.
Buying old Gmail accounts can provide you with a more efficient and effective way to market your business. By having access to multiple accounts, you can create and manage multiple email campaigns simultaneously.
Old Gmail accounts can also provide you with enhanced privacy. When you buy an old Gmail account, you are buying an established account that has already been through the verification process. This means that you are less likely to have your account suspended or terminated for violating Google's terms of service.