FIG. 1 is a front perspective view of an appliance base embodying the new design;
FIG. 2 is a rear perspective view of the design shown in FIG. 1;
FIG. 3 is a front view of the design shown in FIG. 1;
FIG. 4 is a rear view of the design shown in FIG. 1;
FIG. 5 is a left side view of the design shown in FIG. 1;
FIG. 6 is a right side view of the design shown in FIG. 1;
FIG. 7 is a top view of the design shown in FIG. 1; and,
FIG. 8 is a bottom view of the design shown in FIG. 1.
The broken line shown in FIG. 8 is for the purpose of illustrating portions of the appliance base and forms no part of the claimed design.