I've done some research (because I am interested in the rifle) and here is what I found.
There are four grades of Sauer 90. The Select, Elegance, Avantgarde Grande and Avantgarde Grande Lux.
The Select is a beautiful rifle and it gets better from there.
Elegance:
The Grande Lux includes:
2 different hand engraving options of the S 90 Avantgarde Grande Lux showing game motives in exclusive elaboration. Choose between 2 options of ornaments and 2 pieces of the following animals: roe deer, red deer, wild boar, fellow deer, chamois and moose. Additionally, 2 different ornaments can be chosen: leaf arabesques or oak leaf. Special requests and extensive engravings can be effected by Sauer Individual on demand.
and looks like this:
The price of the Select is (Frankonia) $3090
The price of the Elegance (Frankonia) $3645
The price of the Avantegard Grande Lux (from Cz Kettner) is $11,500.
They are also available in full stock (stutzen) for slightly more money.
As a comparison the CZ550 Magnum is $1520 in Frankonia.