I have this one, and I'm pretty happy with it.
http://www.amazon.com/Nesco-America..._1?srs=2597261011&ie=UTF8&qid=1362342956&sr=8-1&keywords=nesco+dehydrator+fd-61
They really improved the design, I had a much older model, maybe 25 years ago, and the fan and heat was on the bottom, which made it a real pain to clean because naturally everything dripped down on to that and you're not able to submerse that for cleaning. Now the fan and heat is on the top! Big improvement.
I still had my trays from the old unit, and a neighbor was throwing hers out because it was broken so I got those trays for free, now I have 12 trays for it!
With that many trays this is a great product, but at 12 bucks for 2 trays... I dont know if I'd want to buy 8 more or not. I probably would I guess.
If you're going to be doing high volume stuff, there's other brands that have drawers and they are professional grade. For me, $60 was exactly in the range I was looking for, it's what I need for making banana chips and dehydrated scrambled egg powder, etc.