someone on Kijiji(craigslist) offered to trade me his rift cv1 for my headset and stand im selling priced at 110CAD. is it worth getting? I have a beefy PC. and do I need to use the external sensors at all times? even if im just using the headset on my chair? i imagine id get tired real fast setting it up. wasnt really too interested in VR but I thought it would be a cool toy to use if I can get it at a good trade