Last weekend I had to replace the front drivers side brake hard line. While I was doing this I decided to also replace the flex hoses and throw on some new pads. When I was done I started to bleed them and the bleed port was rounded off and when I put the vise grip on I broke off the tip. So, I went to Autozone to get a replacement valve. There were $10 bucks for 2, but they had a bunch of different sizes, I went to the counter and the guy looked it up and came back with the replacement caliper so we could size them up. As he was doing this I happen to glance at the computer screen and noticed they were $9 bucks with a $11 core charge. OK??? Needless to say I bought the calipers which came with new bleed ports but I'm still trying to figure out why Autozone was paying me to buy them. Computer error? or is this how they do things? If anybody can give me insight, it would be appreciated...