Prime-XI is now on the Bittrex Trading Exchange.
You can also trade on C-CEX and Crypto-Trade.
Bittrex – https://bittrex.com/Market/?MarketName=BTC-PXI
Prime-XI – https://WWW.PRIME-XI.COM
BitcoinTalk – https://bitcointalk.org/index.php?topic=701871.msg7931657#msg7931657
Twitter – https://twitter.com/OfficialPXI
