Yellowpages.com Sponsored Listings

I'm just curious to know if anyone here ever tried a sponsored listing on yellowpages.com so that you are listed above all the free listings. If you tried it, do you think it was worth it? 

I think the price must go by the area where you are from because the highest monthly charge I see is $41 per month for a "platinum listing". I had to enter my zip code and that's why I'm guessing the price varies by area. I already have my site ranked well in all the major search engines so at this time I'm not really looking to have it optimized.

I was curious about the featured listings because even though my company name starts with an "A" I randomly appear on the last pages, even when you select to view companies alphabetically. Several of my customers and prospective customers found me on yellowpages.com but only because they clicked on my town name on the side to limit the number of cleaners that show up. Since I'm the only cleaner in my small town, they called me.

I can't justify an ad in the local printed yellow pages, but I'm considering to give the featured listing on the site a try to see what kind of results I get.