>>273562750
The best sub $500 options are the Rift S, the Odyssey+ and the Quest. 

The answer to which one of those three you should get depends on your usage;

If you're going to want to play truly wirelessly and in multiple places, show it off to other people and take it with you? Quest.

If you're going to want to play everything, maximum compatibility, and you can deal with the IPD and sound issues? Rift S. In general terms this is the one most people are going to be wanting and the one most suitable. I recommend.

If you're primarily looking for a seated experience to play vehicle based simulators where the panel is important but hand tracking less so? Odyssey+ (It's also the cheapest)