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?