I stock up on rodents when I go to reptile shows. I won't pay $10.99 for a single "jumbo" rat (the ones they have are actually closer to a medium) or $6 for a 3 pack of mice at my local Petco.
I politely told the idiots they have running the reptile section about a retained eye cap on a ball twice over a period of 2 weeks, but they couldn't be bothered to fix it.