Only $5

To protect against harm

to purse or person

purchase a dictionary

of the canting crew

Then inoculate yourself

against voices and jargon

that aim only to part

your money and you

Vendors and Mountebanks

While to certain modifiers

vendors modestly confined

themselves as they identified 

their goods

  "Fine oranges fine lemons"

  "New flounders new"

Mountebanks extravagantly advertised

  "That excellent and by all physicians approved drink"

  "A balsam that cures all that ails you"

Transforming through superlatives 

and promises their goods

not so good