The Collaborative International Dictionary of English v.0.48:

Scavage \Scav"age\ (?; 48), n. [LL. scavagium, fr. AS.
   sce['a]wian to look at, to inspect. See Show.] (O. Eng.
   Law)
   A toll or duty formerly exacted of merchant strangers by
   mayors, sheriffs, etc., for goods shown or offered for sale
   within their precincts. --Cowell.
   [1913 Webster]