1 BTC = 6484.4575 USD (average from all sources)
1 BTC = 6473.8699 USD (source: https://poloniex.com)
1 BTC = 6532.97 USD (source: https://coinbase.com)
1 BTC = 6466.79 USD (source: https://www.bitstamp.net)
1 BTC = 6464.2 USD (source: https://kraken.com)