Good morning Matt. Welcome to the site. If you take a look a the top of the for sale section you'll see where the "For Sale Rules" are posted. The site requires that you PayPal a 25$ fee in order to post boats for sale. Once you've sent the fee you just add the transaction id to your post and you're good. This helps keep the website around.
Thanks.
Edit:
jason@hgane.com. That would be the email to send your 25$ fee to.