very urgent 15euro Paypal F&F to 10euro btc or eth
You mean You want 15 euro paypal which will be F&F to you and you will pay in BTC or ETH? I am sure someone will pop in here to give you a hand. I just want to remind you for your and other parties safety that do not deal with any newbie or less trusted member who has not trading history here. If you do then make sure you use a trusted escrow.
~snip~
I myself wouldn't make a deal with you due to you being untrusted and the consequences that could carry -- chargebacking. certain traders on paxful however, would gladly carry those risks for a 50% fee.
I think OP is asking for paypal. So, you can ask OP to send the coin first to minimize your risk.