http://gizmodo.com/5033865/study-average-mac-computer-price-more-that-twice-that-of-average-pc
According to data collected by the NPD group, the average Windows notebook goes for $700, while the average Apple laptop costs above $1,500, dropping a mere $59 in the last two years.
The average Mac desktop sells for about $1,000 more than the average PC desktop, which sells for a mere $550.
Specifications often vary sharply for these systems, with Apple often focusing on faster processors than some rivals in notebooks but at the expense of memory and hard drive space. Its insistence on using mobile processors and custom designs for desktops, however, has created feature discrepancies where a Dell Inspiron 518 tower nearing the $700 mark features two more processor cores, three times as much memory, and twice the hard drive space of an $1,199 entry-level iMac despite both coming with near-equivalent LCDs.