Valient Front Airdam

I have to ask what would something like that cost being 6 7 years old back then? I remember the gas crunch in 78 and the v 8 cars were going for cheap...I was a kid but I remember my mom looking for a car and saying " a Dodge charger takes too much gas..." she ended up with a 66 Chevelle with a 283 in 1977...:)
I paid $1200 for it from the original owner.