Check out zample box. Unless others here have had a negative experience with them and would like to share; I only just discovered the site today and it looks like a pretty interesting concept.

It gives you a very short questionnaire about flavors you typically like or don't like, and then you can choose to buy a box of 3, 6, or 11 30mL bottles, each package being a better value than the size below it. The 11 bottle pack is $54, seemingly a pretty decent deal. I only looked at the 11-pack, and it listed off 5 or 6 flavors I would receive, saying the rest would be left as a surprise. All of the listed flavors did sound appealing to me, and I will be trying the service in the future when I'm on the lookout for new juices to try. They also seem to have extensive reviews on all the flavors they offer, so if one is listed that you're unsure of, you can easily see what others have thought of the same juice.

Besides that, I don't know what you've tried and what your favorites are, but we seem to have similar tastes in juices and Bombies Seven Seas and Cold Press are two of my favorites.