The Collaborative International Dictionary of English v.0.48:

Vendition \Ven*di"tion\ (v[e^]n*d[i^]sh"[u^]n), n. [L. venditio:
   cf. F. vendition.]
   The act of vending, or selling; sale.
   [1913 Webster]
   [1913 Webster]

WordNet (r) 3.0 (2006):

vendition
    n 1: the act of selling goods for a living [syn: vending,
         peddling, hawking, vendition]

Bouvier's Law Dictionary, Revised 6th Ed (1856):

VENDITION. A sale; the act of selling.