In this case lots of money.
This matched pair features a bird on the front sight that pops up, flaps, moves its beak, and sings no two songs alike, when the trigger is pulled. Finished in lacquer, with tastefully placed diamonds and gold detailing, Christies expects these two to fetch up to $2.5M for the pair.
Lacking a good tactical IWB holster set, I think you could snap these babies up for as little as $2M. If she didn't already have a Ruger Mk 2 of her own, I'd snag these up in a heartbeat for the little lady. What woman wouldn't love to have these in her gun safe?