--snip--
> In short, rather than jumping to assumptions, do some research first.
--snip--

Follow your own advice. I already said I get the part numbers off the web
sites beforehand and -of course- I check the prices as well. I also already
said I sometimes pay the higher price to get a higher quality part if I
think it's necessary.
I can't remember the last time I saw a lower price at Napa on anything I'd
checked. I don't doubt that they have some lower prices than their
competitors but if they aren't for what I need it doesn't make any
difference to me.
In short, rather than getting pissy with somebody and garbling your
metaphors, read their posts more carefully first and don't try to tell them
they don't know what they in fact do know.

Robert