Can I try a theme before placing an order?
Every theme has an online demo, that should give you a good first impression of what the theme looks like and what its capable of. It is not possible to access the WordPress admin area, but the theme detail page of every theme provides you with plenty of information, plus screenshots of the admin area.
You can purchase and try the theme risk-free, as each theme comes with a 30-day no-question-asked money-back-guarantee.