Specialist trade stores often have better quality or pricing, or better quality and pricing. Both Home Depot and Amazon are quite consumer-focused, so they can

Specialist trade stores often have better quality or pricing, or better quality and pricing. Both Home Depot and Amazon are quite consumer-focused, so they can pull off some price skimming. 3 for $5 is not bad but I imagine you'd be able to get something trade quality for that price.