"Double sided errors where the same design is on both sides of the chip instead of different designs on each side of the chip are very popular. Generally speaking, they bring anywhere between $200-$400 in the A.C. market."

AC errors like you describe above bring more than NV errors. Those AC guys are crazy when it comes to vying for chips.

LV chips like that bring $70 to $125. But any error is always worth what someone is willing to pay.