I picked up mine from walmart.
Snackmaster Express.
It ran about 40.00 and it does just about everything well. I ended up getting some more fruit roll sheets, cause that (along with tons of beef jerky) is what I use it for. Its been groing strong for over 2 years now.
If you want somthing more industrial, look to the excaliber (sp) line. They start at 150.00 or so, but its definately professional quality.
Whatever you do, make sure you get one with fan and temperature controls. Otherwise its uselses.