If you have no idea what is being talked about, you should not be posting unhelpful spam. There are no options to look for hdr on newegg or any retailer. There is no easy way to know what has hdr support.
The hdr10 specs are 4k res and up so that already cuts down on your options. It's still rather new and mostly on tvs and even then for full hdr capabilities, you're looking at higher end models which is going to kill the budget. With it being new, it's not widely used, especially as it's 4k, so you're going to have to do more research.
If you are only interested in the wide color gamut and high contrast parts of the hdr specs, then that's been around quite a while. There are lists for 10 bit monitors but for true 10 bit, not 8+frc...