With prices varying by ZIP and for in-store pickup only, Lowe's offers the Red Head Concrete Sleeve Anchor Bolt 10-Pack, model no. 11018, from $2.60. That's $8 off and the best price we could find. They measure 0.5x4". Deal ends April 26.
Yup, Lowe's pricing model doesn't just vary availability by store but also pricing. It's $2.60 in lots of locations (including Tampa, FL; Huntsville, AL; and Pittsburgh, PA).
It's worth noting that it's not simply geographically varied -- if you have multiple locations near you, check all of them. One may show full price while another just a few miles down the road might have the discounted price.