Cucina, owned and operated by an Italian husband and wife couple, is more than a smorgasbord of gourmet oils; it's a workshop that teaches you about the different kinds of olive oils and balsamic vinegars and how to correctly use them.
After a 30 minute tour with the husband I learned how to properly taste the oils and vinegars and what the flavor characteristics were of each one. Think wine tasting and you'll get the idea.
Their customer service alone is worth more than what I paid for a 4 pack: 2 table oils and 2 balsamic vinegars. I paid around $40 and considering that I walked in there with very little knowledge of oils and vinegars and left with a 4 pack and 30 minutes of useful information their prices are pretty inexpensive.