Here is a picture of the abundance of lime juice available, and the empty spot on the right where the lemon juice should be.
Here is a picture taken in the produce section of this particular grocery store. As you can see (sort of) lemons go for 98 cents each, unless you buy them in twos, in which case you get them for 88 cents each. Call me crazy, but this is akin to highway robbery if you ask me! On the plus side, however, these lemons look to be in better shape than I've seen anywhere else. I still didn't buy any, though.