praemercor

prae-mercor, ātus, 1, v. dep.,

• to buy before or beforehand (ante-class.): praemercatur ancillam senex, Plaut. Merc. Arg. 2, 10; id. Ep. 3, 3, 25 (406): ni pretio minus parcerent, eaque praemercarentur, should forestall the markets, Cass. Hem. ap. Plin. 32, 2, 10, § 20.