Yes, DIY folks will sometimes send free samples (usually for the cost of shipping). You can get a "sample pack" from vendors fairly inexpensively to see how you like their juices but it won't be free. I believe free samples are not really offered at this point, although you used to be able to go to a brick and mortar and taste for free, often they will ask for a "Dollar" or something, so they are still "Selling" not "giving away" which is sort of unclear as far as the FDA's stance on that at the moment.
Best of luck ,welcome to ECF,.
Anna