96Ds were fairly common. When a lot of agencies were switching from 357 revolvers the idea of a 12 shot 40 caliber with a revolver trigger was appealing. Unfortunately.
The 96D with the D Brigadier slide was not. They’re fairly rare and if you find one it’s going to be from PSP, Shelby County, or one of a few hundred purchased as personal weapons directly from Beretta by INS/USBP people.
Of course all the government owned/BP Beretta were destroyed thanks to Bill Clinton.
While the brigadier was more pleasant to shoot than a standard 96 none of Beretta‘s attempts to make the 92 series work as a .40, including the 96A1, were durable. Very reliable in terms of cycle of operation, tolerating dirt, etc. but durability was their Achilles heel. The other problem was prior to the vertec grip, if you had small hands you were pretty much screwed. That was as big a factor as the durability issues in pushing INS/USBP to HK compacts.