If you visit NYC then be sure to check these ones out:

Street Peddlers - they sell pretty much everything from a cell phone holster to the portrait of Marylin Monroe. They have this cheap table on the street and they have merchandise on it. Usually they yell out loud stuff like "Special sale! Designer handbags only $10, buy your's now!"

MSG Scalpers - These guys are allover the Madison Square Garden area and are on the ready to sell you a ticket.

Homeless Guy Who Likes Booty - Theres this homeless guy who sits on the staircase to the subway and always say "Pleeeeezeeeeeee, please, will you help me, please, ohh pleeezeee". I once caught this guy red-handed when he took a glimpse of some hottie's fine booty and he said something like "Damn! What an ass!".

Underground Nigga Rappers - these guys are also allover the city, a lot of them are in the Times Square area and are on the ready to approach a visiting tourist and hustle them for a home-legged CD-ROM.

Candy Hustlers - these dude are also a plenty and will aproach you on a street and ask you to buy either peanut M&Ms or Starburst, because that is all they have. They will tell you that sell candy so they can stay off the streets or support a basketball team.

Subway Performers - these guys usually travel in the packs of 2-4. Basicallly what they do is they perform backflips in the moving subway cars to the tune of some hip hop music.