Mosaic City, located along China's coast, is quite large city sometimes called the Crossroads Between Nations due to its diverse population. While it was once a large tourist spot, the city was placed under a blockade as the military appeared claiming there was a radiation leak. The true hazard, however, is much more sinister.
This is where you can get salvaged goods appraised and sold for a reasonable price. Salvaged goods can be found anywhere in the city, but the best stuff seems to be found in heavily shadow-infested areas.