There's several available for around $100 on Amazon. I have one, it is hard to know how accurate/complete it is with respect to VOC detection, I mainly use mine

There's several available for around $100 on Amazon. I have one, it is hard to know how accurate/complete it is with respect to VOC detection, I mainly use mine for PM10 detection during fire season, and it seems reasonably accurate in that it agrees with the state's readings