Have you ever thought how much price premium you've spent for the Dell label in your lifetime? I bet not 
Yes, I have thought about that. Buying Dells the way I buy them saved me lots of money. That's why I did it. I've been comparing and buying computers since the early 1980's. I've bought and used many non-PC types (Ohio Scientific, TRS-80, PET, Sun workstations of various sorts, NeXT, Apollo, Apple II, Apple III, Lisa, the first Macs and later Macs, some CP/M computers, HP workstations, DEC workstations) and many PC types (IBM, PC's Limited (precursor to Dell), Gateway, Dell, Compaq, Grid, build it yourself, ones built by local computer shops, HP, and probably some I have forgotten, like Packard Bell or AT&T or Honeywell or something like that, PC Brand, etc.). In experimenting with lots of different brands, I have been most happy with Dell (hence the reason I stayed with them for many years after finding that out experimentally). If I were more happy with another brand or with build it yourself, I'd be doing that instead.
There are several ways I think about cost of a PC: how much it costs initially to obtain it, how much it costs for upkeep, and reliability (or more precisely the costs when there are reliability problems or upkeep hassles). Dells (the ones I buy) are inexpensive for the performance they deliver, typically less costly than a build-it-yourself of comparable performance; have the lowest maintenance cost of any other route or brand I've tried; and likewise have very low failure rates.