Just for comparison's fun, I looked up the retail prices from "shm" (Süddeutsche Hülsenmanufaktur, that's Mr. Zirngibl in Schierding). The 6,5x70R clocks at 4,34 €. Expensive in my opinion, but they enjoy the opposite reputation of crappy Bertram, namely a very good one.

Their 6,5x58R are at 4,12 €, the 7x72R at 3,66 €, the 8x57 R360 at 3,12 € and the 8x58R at 3,53 €.

The former Horneber case production closed in 2021, and has been acquired by Reimer Johannsen, but I am not currently informed inhowfar and for which calibers they still continue.