Dennis, while they're not yet very popular, there is another (much less spendy) version called a spring-tine aerator.

They work on a very simple but clever concept. The blades are a flat, star-shaped piece of spring steel and the tip of each point is twisted slightly. As the aerator is pulled along each of stars roll and as they do each successive point digs into the earth. However, since the points have been twisted, as they dig in the point twists and opens a hole.

We have been using this type of aerator quite successfully for a few years now, the advantage is they take a mere fraction of the horsepower to pull, and cost a LOT less, they also require little if any maintenance.

The one BIG advantage for us is that they leave no unsightly plugs behind, they just make an opening in the ground. With our reel type mowers those plugs are a maintenance nightmare, they take the edge of a mower in no time flat, and sharpening is VERY expensive.

Best of luck.

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