Worth mentioning that Vive is now sold is an updated version with better lighthouses, brackets and lighter headsets. I also want to notice that very many have had problems with their 1st Gen Vive (broken checks, etc.) and be careful about used, after the recent price reduction, I argue that a new purchase is the brightest choice.
So is Vive worth the money? VR is great if you can live with the low resolution. It is VERY low-resolution. After a few days, however, you stop thinking about it and "sinking" into the experience. Recommend at least GTX 1080 to be able to play with +1.5 super sampling, this makes text, etc. becomes easier to read, but it does not remove the low resolution.