I paid about $1800 dollars for my Rapier system.
This was a 2" tubular 4 into 2 in 1 with a single muffler with two 1.5" outlets, very much like the left side of the Pantera system.
It was worth it for me because I drove it all year round whatever the weather for nearly twenty years.
Compared to the cost of the mild steel header, 2 or 3 centre sections and back sections and all the hassle to change them in was a good investment.
For a Pantera used only in dry weather, it's probably not value for money. But you can polish the whole system from cylinder head to tail pipe