FYI... I would say bestbuy.com is a good example of the average person's shopping habits. They're also one of the few sites that you can easily sort by "best selling." Amazon does this, but they don't offer the iPhone so I don't bother with them.
AT&T (92 phones offered)
14. HTC 8X Blue 8GB (14. a week ago, 37. a month ago)
26. Nokia Lumia 920 Black (24. a week ago, 17. a month ago)
30. Nokia Lumia 920 Cyan (30. a week ago, 56. a month ago)
31. HTC 8X Yellow 8GB (31. a week ago, 71. a month ago)
39. Nokia Lumia 920 Red (40. a week ago, 53. a month ago)
45. Samsung Focus Flash (57. a week ago, 63. a month ago)
46. HTC 8X Blue 16GB (65. a week ago, 70. a month ago)
47. Nokia Lumia 920 White (44. a week ago, 36. a month ago)
51. Samsung Focus 2 (69. a week ago, 59. a month ago)
58. Nokia Lumia 920 Yellow (67. a week ago, 48. a month ago)
59. Nokia Lumia 820 (49. a week ago, 72. a month ago)
61. Nokia Lumia 900 White (70. a week ago, 74. a month ago)
63. Nokia Lumia 900 Cyan (71. a week ago, 38. a month ago)
64. Nokia Lumia 900 Black (51. a week ago, 39. a month ago)
77. HTC Titan (82. a week ago, 84. a month ago)
78. Samsung Focus S (83. a week ago, 85. a month ago)
HTC Titan II is not offered
Nokia Lumia 900 Pink is not offered
HTC 8X Yellow 16GB is not offered
Verizon (82 phones offered)
22. HTC 8X Black (24. a week ago, not available a month ago)
30. Nokia Lumia 822 Black (29. a week ago, 60. a month ago)
43. HTC 8X Blue (25. a week ago, 59. a month ago)
61. HTC 8X Red (67. a week ago, not available a month ago)
62. Nokia Lumia 822 White (69. a week ago, 58. a month ago)
80. HTC Trophy (82. a week ago, 54. a month ago)
Nokia Lumia 822 Grey is not offered
T-Mobile (32 phones offered)
7. HTC 8X (26. a week ago, 23. a month ago)
15. Nokia Lumia 810 (16. a week ago, 22. a month ago)
20. Nokia Lumia 710 White (19. a week ago, 31. a month ago)
31. Nokia Lumia 710 Black (24. a week ago, 30. a month ago)
32. HTC Radar (32. a week ago, 19. a month ago)
Sprint (47 phones offered)
None offered
AT&T (92 phones offered)
14. HTC 8X Blue 8GB (14. a week ago, 37. a month ago)
26. Nokia Lumia 920 Black (24. a week ago, 17. a month ago)
30. Nokia Lumia 920 Cyan (30. a week ago, 56. a month ago)
31. HTC 8X Yellow 8GB (31. a week ago, 71. a month ago)
39. Nokia Lumia 920 Red (40. a week ago, 53. a month ago)
45. Samsung Focus Flash (57. a week ago, 63. a month ago)
46. HTC 8X Blue 16GB (65. a week ago, 70. a month ago)
47. Nokia Lumia 920 White (44. a week ago, 36. a month ago)
51. Samsung Focus 2 (69. a week ago, 59. a month ago)
58. Nokia Lumia 920 Yellow (67. a week ago, 48. a month ago)
59. Nokia Lumia 820 (49. a week ago, 72. a month ago)
61. Nokia Lumia 900 White (70. a week ago, 74. a month ago)
63. Nokia Lumia 900 Cyan (71. a week ago, 38. a month ago)
64. Nokia Lumia 900 Black (51. a week ago, 39. a month ago)
77. HTC Titan (82. a week ago, 84. a month ago)
78. Samsung Focus S (83. a week ago, 85. a month ago)
HTC Titan II is not offered
Nokia Lumia 900 Pink is not offered
HTC 8X Yellow 16GB is not offered
Verizon (82 phones offered)
22. HTC 8X Black (24. a week ago, not available a month ago)
30. Nokia Lumia 822 Black (29. a week ago, 60. a month ago)
43. HTC 8X Blue (25. a week ago, 59. a month ago)
61. HTC 8X Red (67. a week ago, not available a month ago)
62. Nokia Lumia 822 White (69. a week ago, 58. a month ago)
80. HTC Trophy (82. a week ago, 54. a month ago)
Nokia Lumia 822 Grey is not offered
T-Mobile (32 phones offered)
7. HTC 8X (26. a week ago, 23. a month ago)
15. Nokia Lumia 810 (16. a week ago, 22. a month ago)
20. Nokia Lumia 710 White (19. a week ago, 31. a month ago)
31. Nokia Lumia 710 Black (24. a week ago, 30. a month ago)
32. HTC Radar (32. a week ago, 19. a month ago)
Sprint (47 phones offered)
None offered