The ornamental design for a sandbagholder, as shown and described.
FIG. 1 is a diagrammatic perspective view of the sand bag holder in full
lines with a sand bag shown in broken lines representing environmental
association matter being for illustrative purposes only and forming no
part of the claimed invention;
FIG. 2 is a front elevational view of the sand bag holder, the rear
elevational view being a mirror image of the front view thereof.
FIG. 3 is a right side elevational view thereof, the left side elevational
view being a mirror image of the right side view.
FIG. 4 is a top plan view of the sand bag holder; and,