May I ask you why can't you accept paypal? i will send you money as to a friend/familly so there will be no fees and no possibility to dispute/chargeback.
It doesn't make sens to pay in BTC small amounts as network fee will make the overall cost higher a lot.
You are actually right.
But as far as Paypal is concerned, it is not allowed in my country. There are various exchangers are available here but they do not exchange little amount of $20 to $50. I already have some paypal which I use to buy products only.
That ia the main reason behind to not accepting paypal.
Hope you understand :-)