Produce Companies - keeping them honest

Do you use 1 company exclusively or shop for best prices among a few different?

I shop around, everyone lists their prices online, so its easy for me to save about $75 a week in a few minutes.
Produce is high for me now, im paying double to triple on just about everything except spanish onions

Use at least two suppliers and shop prices every week. Make sure your reps KNOW you are shopping.