280 Ross Dies

RCBS 2x Die Reloading Set 280 Ross Shellholder in Factory Box | eBay

Possible record setting Price?

Probably counting on the fact that RCBS is no longer producing the custom dies, and that Hunting Die Specialties is no longer selling the dies, to drive up the price.
If you want to get dies for the exotics now, you have to go to CH4D.