Free is an option. You could also slap a big "Or Buy This Better Thing" button generated by PayPal somewhere on the signup page. Thats a better option. Why?

Free is an option. You could also slap a big "Or Buy This Better Thing" button generated by PayPal somewhere on the signup page. Thats a better option. Why? Because, its a great way to A/B test if what you're hoping to sell will get traction even with one person. Set the expectation for payment early, Dan Martell wrote a solid post on why this has worked for him in the past. If you give it away free with no expectations of payment, it de-values your product. So set the expectation of payment, slap a "Buy This" button ont there. I sold 6 tea kettles once before knowing where to get them myself. I sent an email to 3 saying sorry were out of stock (fairly true). Then I searched the web for kettle distributors. Sent the email to other 3 asking if its ok if they are a few weeks late. All 3 sold, and several dozen since then. All from a Buy Now Button on a landing page.