My son wanted to earn some money this year, so he started a bunch of transplants. Right now he has:
Purple Sprouting Broccoli
2.00 per plant
These are all nice big plants and are getting to big for the grow lights. They would need to be hardened off before planting. We used heirloom seeds and organic soil as well. Started in rock wool since we first thought of selling for tower garden use, but didn't sell them all. I have never had any problems planting them into my regular garden when started in the rock wool first.
He also has lettuce, kale, kohlrabi and spinach, but these are still smaller.
We are located in Glendale around 59th and Thunderbird