That's true that they're easy to find (especially with Passover and Easter being early this year). My inlaws always get small potted flowering spring bulbs for my girls, and we plant them in the garden after they are done. Some come back, some don't, some go crazy and naturalize.
In the fall, you can buy bulbs and plant them in pots, then leave them in a protected place, then bring them inside in spring for earlier show, or let them grow outside when they are ready. I usually plant a bunch and leave them in the unheated garage (but outside under a deck, porch, up against the building, etc. work too) until they start to grow (which would be around now or a little earlier) but I didn't get around to doing that this year.