I agree that it depends on your budget, but also your needs. I have 5 dehydrators, the oldest being 30 years old! They are a fairly simply stacking tray with a cover set up. I think they are about $20-$30 at Wal Mart and Wally World also has the accomanying supplies, like jerky and fruit roll up trays, jerky spices and such.
I have looked at the fancy expensive ones, but even using mine to dry herbs for sale, I still don't think it's worth it. One thing about the cheap ones is that if you only need to dry one tray, you can leave the others off. I notice that the fancy ones don't seem to be able to do that.
I have a round cheap one, but I no longer use it after getting an excalibur.
I find the excalibur faster. but who knows, maybe i just fell for the advertising.
I like the mesh trays in the excalibur. food doesnt fall through to the bottom.
I am using mine every day now, keeping it going sometimes day and night. as soon as I unload, I load up anohter batch...
Started with a borrowed round stacking tray one that was described as "Really good." Hated the need to always have to rotate trays. Bought an Excalibur and have been well pleased. Can but don't have to rotate trays. Many features strike me as having been very well designed.