I always ask for a price match on parts from a LBS. I don't ask for ridiculous online sale price, just match the regular prices. I add the ~$10 for shipping and pay the tax. I do all of my own research and wrenching, so all they need to do is input it into their regular order, it takes 5 minutes. I'll tell them if they can't do it, that's fine, I'll get it online. The way I see it, I'm giving them an opportunity to make a couple of bucks for minimal effort. If they don't want to take the money, I'll give it to the shop that will.