Free, From local Creek.

[SalmonSlayer2010]

Found some small garden worms under some wood in the backyard Traded them up at the local creek down the road for some fat minnows. Free Minnows. Requires a little work and an aerated container large enough for them to roam about.

[Conger]

yep hit up Walmart and spend $10 and buy a minnow trap, it will pay its self off in 2 days in most lakes or ponds, I have caught upto 4 dozing minnows a day in mine