don't use paxful, and xcoins. coinbase has been the best in my experience they will buy your bitcoins for super close to market value and they will sell the same. they are secure... aka your transactions wont be reversed. they are almost always instant in the literal since and don't require waiting on a third party to accept payment 3 hours later. i think you can also use them to buy litecoins and ether. not sure though. they let you sell your btc to them and pay you via paypal instantly... which is awesome not having to sell to individuals and risking an encounter with a bullshit artist. they also have a built in miner fee recommendation so you never end up not paying enough and risking transactions in limbo.