Here is a good brand one that is fairly cheap
OUT OF STOCK - Roland 8" StiKa SV-8 Vinyl Cutter with CutStudio software - SV-8. Its a roland brand which is really good. They are out of stock right now but I think their price is the best. It says they will have them back in stock like next week. Hope this helps

I have also seen this one fairly cheap on ebay too. I would just make sure to buy a brand that is good, instead of one that is a cheap price.