first post. i have been searching for the answer to that question lately and i did find it. you can use coinbase or circle, but there is waiting times to get verified and all that... i bought some btc through coin.mx.. you do have to verify your card through video, but there is a live chat on the site and as soon as you send your video in you can just chat with them live and they will verify it right away. it took me about 20 minutes to sign up and get verified to buy my btc. once you buy, you get the btc right away. no wait time. you can google reviews to see that they are somewhat a trusted site. only catch is they take 7.5% of your deposit. i bought 60$ worth btc and they got 4.5$ i believe it was. if your just trying to get some quick btc and don't care to pay fees, then that is the way to go. that is the easiest way to get btc that i have personally found.