I personally own a Nesco Snackmaster dehydrator. My husband got it for about $45 from our local Wal-Mart and gave it to me for Mother's Day. It was on my wish list. I really like my dehydrator. It came with 5 trays and I can expand it up to 12 trays. I can also add fruit roll trays, which I use all the time. It takes less than a day to dehydrate the fruit roll-ups. The dehydrator does warm up my kitchen, but it also make our home smell delicious.
There are a lot of different dehydrators available - just search for "dehydrator" at Amazon.com. Before you choose one, I would recommend reading the reviews.