Some math

11500 delivered
  2400 6 1080ti at 400
  9100
  2000 8 1070  at 250
  7100
  1800  12 580 at 150
  5300
  2000 for shipping
  3300
  3300 20 x 215+ at 165
       0

other then shipping for 2000 your pricing seems okay

And I am not that sure  2000 is a terrible price to ship it.

do you have original boxes?