That's not a problem mate. Take into consideration any type of PayPal payment can be charged back, no matter what. Look at peoples vouches too and always use an MM or OMM if you feel uncertain about trading with someone.
Official Middlemen have completed a lengthy process where they middleman a certain amount of trades for a certain value I.E 10 trades middlemanned with each trade $50 or under in value.
Middlemen offer the same service as omm's but the majority of the time, they aren't as trusted.