This guide contains the locations of all the wanted posters in Mafia 2, which upon collected will grant the Card Sharp achievement. A full zoomable 2000x2000 map is included showing highly accurate positions of all wanted posters. The numbered markers on the map correspond exactly to each poster's number in the collectables list. Click on the map link to zoom in.
Wanted Posters can only be collected in the original Mafia 2 game- they won't appear in DLC. The best time to get all the wanted posters is Chapter 14, after you defeat Derek. You have plenty of cash, enough to bride any police, and it is effectively free roam with full access to all areas.
Full Map of Empire Bay with Wanted Poster Locations
Click to enlarge...