What are Pros and Cons of buying a Instagram Account?

Hi guys,

I been offered a instagram account with 200k followers. Just wondered what is the pros and cons if i was to go ahead with this?

Can he take them account back of me at any time or is it fine once i changed telephone and email? Transaciton will go via paypal.

Also how much work will have to be involved and do you have still use powerlikes or can use other methods?

Thanks