Adult site - What do you suggest for payment & transactions?

Hi everyone, this is my first post in a long time, and i know there is wealth of knowledge here. I am willing to hire someone for this job, but my main question is such…

I have a client website thats not so cut and dry with using paypal for transactions. Its an adult auction style site.

Whats your professional recommendation for moving money between buyers and sellers?

thanks in advance.