Maybe you could see if a parent would be willing to open you a paypal account (with your own bank info and card), and maybe take cash payments from within your own country - if you are comfortable and you feel safe with the Buyer.
With paypal though, I would be very careful to make certain it is your parent because of taxes and fees and so forth. I would never have an 18-year old friend help me with it if it were me.
However, sometimes trading is far better, especially if you are still collecting.