Why would you want an exchange script from someone who also makes HYIPs and MLM scripts?
--
Also, my client spent 6+ months and thousands of dollars with their company, CoinJoker. He lost everything. CoinJoker isn't the only brand they operate under, they have several other websites offering the same services. I am not saying that they will scam you, but they will deliver a bug-ridden product filled with exploits.
Recently, one of my clients who ordered their LocalBitcoins clone contacted me and complained about funds "disappearing". He lost around 0.80 BTC.
By the way, keyword stuffing the thread doesn't inspire confidence either.