No I have often done it. Just send them a message on eBay and offer to buy it via paypal. That way they don't have to pay another listing fee and it is fully traceable and with the Paypal guarantee. ( a lot of people do not realise eBay and Paypal are two separate companies now )
You may have trouble as eBay will not allow you to put your Paypal or email ID on eBay messages, but I get round it by asking them to text you the details ( or I have put a photo of my email address on eBay messages),phone numbers are permitted!