But then I found this one at my local cake supply shop in Indianapolis, Ms. B's Sweet Supply, in Speedway (yes, it's near the Indy 500 racetrack!) http://www.msbssweetsupplies.com/
It was only about $15 .... very comparable to those plastic ones I had seen in the other stores, but with two levels of pressed wood construction, I felt much more comfortable with it being able to hold the weight of my large cakes. The formica top makes it easy to clean. To keep cakes from skidding, I just put a small square of non-skid material (sometimes called shelf liner) under the cake. This material can be purchased in rolls at Walmart or Dollar General stores.
Here is a photo of the underside of the turntable with a better view of the wood construction. The table turns smoothly and easily, no matter how heavy the cake is.
I was so impressed with this turntable that I bought a second one. Even if you're not a baker, this is a great kitchen tool or it will work wonderful on the center of the kitchen island or dining room table.