In that cas I would advise you to put the funds in an escrow first and after paypal's investigation has been done on the matter it would be decided who'se fault it was in closing of your account and if it was your own the escrow will forward the payment to OP and if it was OP's fault the escrow amount will be returned to you.
If this was not your fault I will request QS to remove the neg. rep from your account regarding the transaction but it depends on him if he remove it, and even if he does he may tag you for using blackhat methods.
Right now I don't think anyone will trade with you with that negative feedback. This is the solution I offer.