A way to attain seeds without spending any money is to harvest seeds from your own plants. I have never done this before. I hope to do document my experience of seed harvesting this year.
But some of the benefits of harvesting seeds and what led me to decide to try it this year are
-Buying new seeds is unnecessary.
-I get to know my plants and my seeds. No tricks on how to grow them.
-I can produce a seed variety that I own and like that may not be sold anymore.
-And I can reuse what I already own-a great thing I am learning to teach my children especially in our consumer lead culture that is having dire effects on our environment.
Sounds like a win win situation.