You should be able to find one locally, I always lean towards contacting the nursery to see if they have one because quality is usually better. But I'm pretty sure HD and Lowes should have them.

I find me nursery is usually extremely over priced.

The one here has the same ficus grown by Costa farms in Florida that lowes sells. Nursery are usually 3/4 times more expensive.

Some states will not allow mail order citrus plants to come into their states, but Four Winds is a big citrus grower. They do mail order and supply a lot of nurseries in the US.

Home depots near me (Alberta Canada) always get in dwarf lemons and oranges around May-June. Yet I think they are around 50 dollars or so.

You sometimes find them, especially Meyer lemons, in big-box stores in early spring when they're in bloom. I think a lot of growers have scaled back from offering citrus as indoor plants because they need so much light to thrive and so many home gardeners have bad experiences.

I've had citrus many times over the years, scale, mealies, and spider mites are horrible if they are not happy. I usually leave them on my porch and spray them about 20 times with fish emulsion before ever bringing them in.