Can I get a free trial or see some premium data before buying?

Yes.  Almost all premium data feeds come with free sample data.  To access free sample data from a premium data feed, log in to your Quandl account and go to https://www.quandl.com/search. Click on any premium data feed that interests you. This will take you to the home page for that feed where you will be shown sample data. If you do not have an account yet, you may sign up for one here. It is free to create an account and no credit card is required.

When you sign up for an account, you will be asked your purpose for using Quandl (ie. Business, Academic or Personal). Please ensure that you select the most appropriate purpose for you.