The ornamental design for a merchandisedisplayunit, as shown and described.
FIG. 1 is a front, perspective view of a merchandise display unit showing our new design;
FIG. 2 is a front view thereof, the rear view being identical to the front view;
FIG. 3 is a right side view thereof, the left side view being identical to the right side view; and
FIG. 4 is a top view thereof.
FIG. 5 is a front, perspective view of the merchandise display unit of FIG. 1 with additional environmental subject matter;
FIG. 6 is a front view thereof, the rear view being identical to the front view;
FIG. 7 is a right side view thereof, the left side view being identical to the right side view; and,
FIG. 8 is a top view thereof.
The features shown in broken lines depict environmental subject matter only and form no part of the claimed design. The non-illustrated bottom surface and the unshaded top surfaces also form no part of the claimed design.