Bitcoin purchases

[Palesantos]

Either earn it or buy using LocalBitcoins, they have the most options to choose from.

[Cosman]

paxful has a lot of scammers or lowballers. if you're using a credit card, your best bet would be www.coinbase.com

Paxful does have a lot of scammers but if you're paying with a credit card, PayPal etc, they tend to be legit if they have a good feedback record. There is a lot of trusted sellers there, the downside is the fees.

OP, here's a list:
LocalBitcoins
Paxful
Coinbase
Circle
CampBX