Going to buy some wild flower seeds

Thinking about making a trip over to desert botanical gardens in phoenix to pick up some wild  flower seeds. The time is right now to throw some seeds out in the yard and garden. Just a heads up on the wild flower seeds from desert botanical garden in phoenix, I spoke with someone there over the phone and was told they charge a flat rate of $12 to ship wild flower seeds! I couldn't believe what I was told when I heard that price. Seriously, that is a total rip off for shipping and handling for wild flower seeds. I guess that how they get you to come down to the desert botanical gardens lol.