Pimp and prostitute costumes are sold. But I agree, the Nancy Reagan thing isn't even funny. The American prisoner one is sick too.
I was Che Guevara for Halloween.

Only 3 people recognized my costume: A Korean War vet, the cop with the candy, and my uncle's next door neighbor.
[OT: I think the red Kraut beret threw people off. Next year, I'll try to find a betterblback beret and get that red star on there like Ramparts picture has.]
Always next year.