Even the staff had moved to new hideout in Downtown, three of the four hideouts in Midtown are still functional.
Downtown Isenstadt has only one Black Market hideout while Midtown Isenstadt has four (main hideout, the one in Raven's Nest Tavern, the one near level entrance to Church, and one inside sewer).
On the table where Anton Kriege is working, is a Luger with bullets around it.
74 sticky grenades in a rack inside the cage.
Also in the same Black Market mentioned above, the player can see a few British No.
Both of them are the only American weapons found in Isenstadt.
In the Black Market, on the basement of the building on Midtown West, there is a Colt M1911 on the counter and 2 BAR's on the floor.
There are several Black Markets throughout the game, first encountered shortly after Train Station mission as part of tutorial.
All of the upgrades cost money, found by doing missions and collecting Gold.
Unless you find every single dollar in the game by finding 100% collectibles and doing side missions, purchasing the ammo is not recommended unless you want to use rare weapons extensively. The gold you find will never be enough to buy all updates for all weapons, so only upgrade the weapon you use the most.
Certain Veil upgrades require a certain number of Tomes to be found.
Certain weapon upgrades require a certain number of Intel to be found.
Upgrades can be sold back for half-price. Most unlock after progressing through the game, but some require a certain number of Tomes or Intel found to unlock.
The Black Market sells all upgrades found in Wolfenstein.