VIVE is the name of HTC’s flagship line but it was also the name of their first headset. You can’t get the original VIVE brand new anymore. However, you can get used and refurbished models at the link in this paragraph.
Naturally, VIVE has come a long way. You’re not going to get the same image resolution going with an older model. However, you will save a lot of money. The original VIVE is currently selling for (coincidentally?) the same $400 as an Oculus.
At a hefty $5,000 the VR-2 is marketed for professionals. Though, it does also support Steam. So what could possibly make a VR headset cost $5,000? How about human-eye resolution, 20-20 eye tracking, and a heart-stopping refresh rate?