Unfortunately it isn’t possible to receive a trial version of the plugin. However, you can use the Online Sandbox to play around with all the plugins. Besides that, check the demo pages of the plugin, the product pages and in the Documentation how the plugin works and feels. If you have specific questions about the functionalities, just let us know!
We can't give you a discount as we are exclusively selling our plugins via the Envato Marketplaces. If you would like to receive a discount for what reason, you should try to contact them.