How to safely buy a group in VK?

Question

Monetization

Hello, there was an offer to buy a group in VK through the group purchase exchange.
The group is connected to the RSVK, it is transmitted in the place with the account, probably because the RSVK is connected through his account, in this post I am not interested in the profitability and payback of the group, the question is:
Can I, after purchasing through his account, connect my account as a group administrator, and delete his account after changing and specifying a complex password. How can I get income from this group in this case? Or will I have to re-monetize this group through my account?
And can the former owner try to restore the rights to his group or account, for example, having learned that I deleted it or, on the contrary, issued it to myself?

Answer 1

What if the old account conducts extensive correspondence in a personal?
I would not delete my old account.