https://www.costco.com, http://cvs.com/, http://www.drugstore.com/pharmacy/default.asp, http://www.familymeds.com/familymeds/, https://www.horizonscripts.com/, http://www.planetrx.com/, http://rx.com/, http://www.walgreens.com/, http://www.vitalrx.com/index.cfm

These are the ones I have bookmarked. When I originally posted the list I had their prices for Cortef, Solu-Cortef and Florinef. I can't find that post and I'm sure their prices might have changed.