What is another word for "bidder"?

Roget's Thesaurus (1911) lists these synonyms for "bidder": abroad, actor, adventurer, and, applicant, aspirant, ass, bagman, beggar, bum, bungler, bunko, cadger, candidate, canvasser, capper, carpetbagger, case, charlatan, cheat, child, claimant, client, clothing, cockatrice, competitor, conjuror, core, crimp, deceive, deceiver, decoy, devil, dissembler, duck, empiric, faker, false, flower, flusher.