coemo

cŏ-ĕmo, ēmi, emptum, 3, v. a. (cf. the contracted form, 1. como), to purchase together, to buy up (class.):

aliquid,

Ter. Ad. 2, 2, 17; Caes. B. G. 1, 3; Cic. Verr. 2, 4, 59, § 133; Cassius ap. Cic. Fam. 15, 19, 3; Hor. S. 1, 2, 9; Quint. 11, 1, 80; Suet. Vesp. 16 al.:

coemptarum rerum pretia,

id. Ner. 5; Juv. 14, 293.