I'm currently accepting PayPal. With PayPal you can pay using a PayPal account or with any credit card accepted on PayPal.
Once the preview of the mastered song is delivered and you consider the work is finished, you will receive an e-mail with the bill and a PayPal button. Clicking on that button a PayPal page will open where you choose the way of payment.
Another ways of payments will be added soon.
In regards to costs, send me an e-mail to [email protected] and explain there what you need and how many songs need to be polished. I will return to you with the work's costs.