If you are buying lawn and garden accents for the first time, opting for something that will not be difficult to move later is a good idea. The reason is that a week or two down the line you might decide that beautiful wind chime will look better on the other side of the lawn. Choosing easily movable decorations will allow you to try them out in a couple of different spots before deciding on the final location.
Secondly, as you buy new accents you might want to move one or more of the old ones to a new spot. And finally, what looks good in a specific spot during spring or summer, might not look so good during autumn or winter.