I actually bought one for $60.00 before x-mas and it isnt the type with the serated blade. It does a hell of a job for the money. I also wanted a commercial slicer but they are hard to come by used and when you do find one they are usually beat. Try looking in the phone book at restaurant supply house and call and see if they have any coming off lease that you could pick up cheap. Some places do lease the kitchen equipment.
good ones are hard to come by unless you want to spend $700 i got lucky with mine we demoed a job with a cafiteria and they gave it to me i looked for years there is a guy in york pa that sells used butcher equipment i bought a grinder off him last year slicers were 400 to 700 bucks i thought a little to much i can find the # if you want