regrator
/rɪˈɡreɪtə/noun
A person who buys commodities (especially food) in order to sell them on at a profit; a retailer; = regrater. Now historical.
Origin
Late Middle English; earliest use found in William Langland (c1325–c1390), poet. From Anglo-Norman regrator, regratour, regratur, variant of regrater, regratier; compare Middle French regrateur, regratteur.