You are very very wrong.
First of all, I'm not a "fanboy"
Secondly I have no idea if this Mac is overpriced.
Thirdly I have absolutely no clue what a "similar" specced PC would cost.
Fourth I don't care what a similar specced PC/Laptop will cost because that one would not run Mac OS X. At least not legally.
Five I have nothing to justify. Why would I have?
You buy for your gods sake what you want to buy.
And please leave me my freedom to buy what I want for what reason I want for what price I want.
If you guaranty that it works, and the upgrades work you can offer me a superior Hackingtosh, I don't care for the Apple Logo.
But I don't spend 1 day googleing and 5 hours working to by a cheap Laptop to install Mac OS X myself. I rather have the real thing and spent those 29 hours earning money with it.
Not to mention that such a cheap laptop probably would break mechanically a day after warranty runs out. My 11" (or is it 12") Mac Book Pro from 2005 with Mac OS X 10.4 just runs fine. It is 11 years old ... Show me a PC OS (except maybe Linux or Solaris) and a "PC Laptop" that would run fine after 11 years.