It is not possible generally answer your question without knowing how much do you earn per click. I recommend to try both of them for some time. Wait until you get at least 1,000 click with both programs. Then compare how much you earned in average for every click and you will see what is better solution for your website.
yea that makes sense. I have some queries regarding buysellads. Like what if paypal is not available in a certain country. That means one cant use them?
Yes i agree. For some sites adsense pays more per click and for some sites adsense pays very low as .01 per click. So doing some research yourself will helps.