The ornamental design for a cardbuggy, as shown and described.
FIG. 1 is a top plan view of a card buggy, showing my new design;
FIG. 2 is a front view thereof, the rear view being a mirror image;
FIG. 3 is a left side view thereof, the right side being a mirror image; and,
FIG. 4 is a sectional view taken along line 4—4 of FIG. 1.
The broken line showing of wheels mounted to the bottom surface of the design in FIGS. 2–4, is for illustrative purposes only and forms no part of the claimed design.