Amazon gives you ZERO free installation gear and tech support. Price difference is insignificant as well.
Nor does Crutchfield, they may "say" it's free but it's not, their jacked up prices cover it.
Lets see at Amazon I spent:
$218.36 - Kenwood DDX372BT Double DIN Bluetooth In-Dash DVD/AM/FM Receiver
$48.95 Pioneer TS-A6885R 6" x 8" 4-Way TS Series (Pair)
$48.95 Pioneer TS-A6885R 6" x 8" 4-Way TS Series (Pair)
$9.47 - Metra 95-5026 Double DIN Installation Kit for Select 2001-up Ford
$3.70 - Metra 70-1771 Radio Wiring Harness for Ford
Amazon Total: $329.43
Now lets take a look at Crutchfield:
$299.99 - Kenwood DDX372BT Double DIN Bluetooth In-Dash DVD/AM/FM
$79.99 - Pioneer TS-A6885R 6" x 8" 4-Way TS Series (Pair)
$79.99 - Pioneer TS-A6885R 6" x 8" 4-Way TS Series (Pair)
FREE - Metra 95-5026 Double DIN Installation Kit for Select 2001-up Ford
FREE - Metra 70-1771 Radio Wiring Harness for Ford
Crutchfield Total: $459.97
Difference of: $130.54
So I would have paid $130.54 for the harness and frame going with Crutchfield vs the $13.70 I spent on them with Amazon.