I have a nesco dehydrator, I think my mom paid $25 -35ish. It makes good jerky. I have only used the seasoning packets they gave me so far. Its easy to make and tastes good. Lots cheaper than buying 3oz or so of jerky for 5-8 bucks. I will make some with teryaki or soy this week.
It makes real good banana chips though. My dog goes crazy for them. bananas are only .99 for a bunch, so its a good deal. Ive made bigger peices, and time can take from 6-36 hours depending on the temperature.
It is inexpensive to try out, and can make some good stuff.