Hello, I have a 63 Cadillac Series 62 Convertible.
I got these prices from the local shop here in LA.
They would give me show quality pieces back, and take my cores in exchange.
Prices with acceptable core exchanges:
Rear center: $550
Rear ends: $320 x 2 ($640)
Front center upper: $250
Front center lower: $400
Front upper ends: $260 x 2 ($520)
Front lower ends: $350 x 2 ($700)
Total: $3,060 + any additional charges where the cores need to be patched and heavily repaired.
I am assuming they would not consider your smashed in rear center, and front lower ends "acceptable core exchanges". With that I would ask for price without core. I would just be clear on what the total might would more likely be. All of your prices are about in line with what would expect to rechrome good cores.. so no surprises there.