We do have audio samples (they're halfway down the sidebar on each product page) and we offered a discount way back in January when we launched.
If you're interested in trying it out but the price is holding you back, here's what I can do for a fellow HN user:
First, complete an order all the way to the PayPal page, but don't pay. Then e-mail me at firstname.lastname@example.org with the order ID that PayPal shows you. I will make your order and send it to you, and afterward, you can PayPal me any amount of money that you think is fair (I'll count it as market feedback).