the.com/salesman
A professional optimist who turns your hesitation into his commission.
means A person whose job is persuading people to buy goods or services, usually for a cut.
from Plain English compound of sale and man, dating to the 1520s; the word is older than the suit, but not the smile.
Quota lawHis friendliness peaks near month-end deadlines.
Pop cultureDeath of a Salesman made the job a tragedy.
Linguistic shiftNow often softened to salesperson or sales rep.