Box of 20 - Rain Bird 6" Sprinkler heads | 5006-PLPC - $75

I have 20 new Rain Bird Flow Shut-off Plastic Rotor 6" Model: 5006-PLPC sprinkler heads. I bought these and ended up not needing the last 20. $75 for all 20 = $3.75 per sprinkler head. These are $25-40 each at discount sprinkler stores.