I have had good luck with this one

2012 NEW MANUAL STEEL CABLE WIRE STRIPPING STRIPPER MACHINE w/ CRANK ARM -FAST $ | eBay

I no longer use it manually, but use it with a drill. However its weakness is that adjusting for wire thickness is not as easy. I paid $30 and did $93 bucks of wire in about an hour my first time using it. Just my experience