We just returned from our inaugural visit to Agora, and I am thrilled to have found this Greek gem. Steve (the owner) could not have been more nice or informative. He was generous with the samples of feta and olives as we decided what to buy.
All of our standard Greek favorites were there: barrel aged feta, kalamata olives, large canisters of imported Greek olive oil, tzatziki and Ion bars. We stocked up on our "usuals", but we were eyeing other things to pick up on another visit. They had some amazing looking chicken and pork souvlaki in the refrigerator case at a great price. Next time, we're getting some. In fact, all of the prices are incredibly reasonable.
If you want the best Greek groceries available in Charlotte, I highly recommend Agora! It's a haul for us, coming from Ballantyne, but it's a trip well worth making!