Can't you guys get a deal going with tirerack and/or carparts.com to have them handle the parts that are generally available and just have them pay you a bonus for linking to them when we buy parts. This saves them money for not having to advertise to us and saves you time. I am an "IBO" affiliated with Quixtar.com and that is the way that their business works and it works very well, just ask IBM or Office Max.
Just an idea. Thanks for all that you do.