A quality machine will pay for itself over and over and over. We have a Roland PNC-1100, circa '93. We bought it with Flexi-Sign and a copy of Photoshop 2.0 bundle, mostly to cut Rubylith for election signs. We have more than gotten our money out of it. Though we haven't tried the glitter yet, we have been cutting an awful lot of reflective from Siser, and have found for that material, a 60° blade does a much better job than a 45°. Roland, Graphtec, Summa, Ioline are all good brands, and I bet you can find a used one easily enough.
Steve