You don't even need to buy or sell PI coins through any random individual online now, You can easily use Athene P2P Platform, They recently launched the platform and so far the testimonials as been good, I have purchased some PI myself and I resold just 2 weeks ago, The platform is much secure and they are growing fast. They also have buying and Selling of Sidra Coin as one of their new features and their rate is quite fair. So I will advise checking them out, although you have to be a registered user of their native coin which is ATH. Just check them out and get more info on Athene Network. You will safe yourself from possible scammers since you are more interested in buying.