FYI, if you don't use PayPal often and want to beat the fees have them send as a "Gift" or "Payment Owed". The only problem with this, or plus to this is that you can't file a dispute when money is sent this way.
You will get hit with fees and it will be a 3% percent charge so I'd have him add that on to what he owes if you don't want to be hit with that.