Can you accept Paypal? If not, why?
Would you be interested in buying if i would accept PayPal?
he is not the only one who will

Since i need to sell them to pay my invoices i will also accept PayPal now.
I'll take these both for $600 Paypal Goods whenever you're ready, shipping to the UK.
he cant, cause paypal hold his money until end of the month...i sent him the money allready with secure paypal, but he sent back
This is not true, i can take paypal if the money is not hold longer than till the 23rd of december. In your case the money was locked till the 31st in which case i had to refund because that is too late to pay for my bills.
it dosnt matter WHO send the money to you - the problem is, that your account is not fully verified and cause this, paypal will hold the money until the buyer cant easily transfer it back...if i send you money and you transfered instantly to your bank account, paypal have to verify that they can get the money back from your bank account.
"Warum ist meine zahlung 21 Tage nicht verfügbar"
https://www.paypal.com/de/smarthelp/article/warum-ist-meine-zahlung-21-tage-nicht-verf%C3%BCgbar-faq3289