The "Payment Instructions:" field is actually an HTML editor so, in order to create breaks between these lines, you will need to specify them using HTML code.
To achieve your desired formatting, you will want to enter "Paragraph 1<br><br>Paragraph 2<br><br>Paragraph 3" into the "Payment Details" field.
Ok, I put in the page breat tags <br><br> and it worked in the error check. When I checked the posting on ebay they are still showing up one sentence after another, with the <br><br> tags in the listing check this listing. oops! I also tried paragraph tags <P> in the ebay revise item list feature. The <P> didnt work either.
Do I need to put an end break tag in? I read in a book they go something like this:
words words<br></br>more words more words
Am I on the right track, or do I need a space between the < and > ?