Well,
The Mauser Parabellum target pieces are pretty rare, and these gold inlayed limited editions are even rarer, especially when it's a target version.
I think this one is slightly overpriced.
A good friend of mine has the original Mauser target pre-production version for sale for a mere 3500 EUR, and a pre-production series target (undecorated) for just under 2000.
He also has a gold-engraved, unfinished and unbuilt one for sale for 5000.
So the price-tag of 12000 is way off. I'd think a maximum of 6000 would be more realistic.
His website:
www.teuto-arms.de
One drawback, he doesn't like haggling