I am thinking about having a yard sale including ammo.
What do people think would be a fair price for .22LR and .22 Mag?
hahaha, now here ya go! You make it high enough to take out some of the online auction dudes, yet not scalp. You will lose either way. If too high, people will hate ya. If too low, the auction boys scoop it up, and people will hate ya.
What the buyer and seller agree too.
We call this novelty the free market.
Personally, I wouldn't spend more than 2/3rds what Walmart would charge for ammo someone was selling at a yard sale because you don't know if it got wet, etc. Caveat emptor.