<< Newegg's shipping charges make no sense at the best of times - they just use them to mess with the prices. >>
Sure if you say so. I'll use an OEM P4 CPU for an example. Using their website, if you are in California, they charge you 6.95 for Fedex Express Saver shipping to ship this 1lb box. If you go to Fedex website and check the rate from area code 91746 (Newegg) to 94704 (me), it is $7.93. If you are print out a shipping label online for Fedex shipping, that's 10% off $7.93 making $7.14. You're also forgetting that Newegg also has to pay for the white-box that they pack the CPU in. If you live in California, most of the time Express Saver packages come in two-days, at the three-day price.
So I don't see your logic. Why doesn't Newegg's shipping charges make sense? Do the math.