The ornamental design for a retail displaystand, as shown and described.
FIG. 1 is a perspective view of a retail display stand according to our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a rear plan view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top side view thereof;
FIG. 7 is a bottom side view thereof; and,
FIG. 8 is a top plan view of the retail display stand of FIG. 1, now shown in an environment in which the retail display stand is adjacent to a plurality of identical such fixtures.
The broken lines including the renderings of cellular phones or tablets positioned on the retail display stand, and the wood grain appearance, illustrate environmental structure and form no part of the claimed design.