Anyway it's just 10$ but when you want to deal with big amounts i think you should be careful or exactly just few of it even if you have to pay more fees but it's safe.
Small or big amount people should be aware of what the other parties' intention, and suggest to trade only to those who has enough trade history and has good reputation. I don't know the trade system in paxful, but I'm assume there should be an escrow system there and should use it.