Yes, I have seen them many times. Small citrus trees sold in a little window box.

Interesting. I have not seen the little airport package trees in the last several years. I fly regularly out of Orlando and Tampa; less frequently from Fort Lauderdale or Miami. I wonder who was producing them -- the State should have closed them down instantly.

Even now it's my understanding that not just any Florida nursery will be able to ship out of state; rather, it will be a select few who are inspected by USDA as well as FDACS, so a double layer of protection.