title: How to use the Paypal sandbox
body: <p>I guess I'm not understanding the fundamentals of the PayPal sandbox.
  I've created a preconfigured personal buyer account with a balance.
  I've logged in, and now I'm going to my site to "purchase" something.</p>
  
  <p>Q: Do I have to point to sandbox.paypal.com in order to test with my sandbox user?</p>