How small (or large) is this machine? Are you sure it is an "EMCO" or is it possibly Impco? What is the tonnage / shot capacity? Mold size capability? Plunger or screw on the injection end? Hydrulic or manual knock out? Lots of unknowns at this point to offer a guesstimate of expected price.
Fill in some of the unknowns and I'll check back.