The downside to NAPA is that they charge freight for anything they don't have local, which I don't think the other stores do. I was looking for a canister purge valve this last weekend, and the part I picked out wasn't local so I would have had to pay freight from somewhere to get it in. The parts guy spent 15 minutes going through all of the valves to find one local. The price was probably about the same as the other with shipping, but I was able to pick it up the next day, and it was nice of the guy to run through all of those parts for me.