1 BTC = 8605.0534 USD (average from all sources)
1 BTC = 8520.0 USD (source: https://kraken.com)
1 BTC = 8717.7 USD (source: https://coinbase.com)
1 BTC = 8583.3137 USD (source: https://poloniex.com)
1 BTC = 8599.2 USD (source: https://www.bitstamp.net)