I've been PoE currency seller since Closed beta.
Here's how stuff work usually - players like me sell items to the big boys with sites for let's say 5$ per exalt and then they sell them to you for 15$.
So at the end I get less than I could and you get less for your money than you could.
Contact me at skype "PoECurrency" to negotiate a trade. I am sure I can give you better price than every big seller.
I am currently playing on Nemesis league.
I got business paypal account - if you are a scammer - don't try on me, it wont work.