A buddy of mine just bought a set, well minus the crossover for $650. It has few cracks on the passenger side that needs repair. Since they are not around and if they in good shape, I would ask $1000 or more. When I was looking for a set, I was willing to pay that much. Now I have two sets and I am not going to sell them. If you look at it, it will cost way more to have them made and who knows how well they will fit. Even with ATRs, getting to the spark plugs is a bit*&.
Just my $.02
Prasad