Newegg and Microcenter are likely 100% unaware of the very specific PC requirements for Pro Tools to run correctly. Not to say you can’t get the PARTS from them to build your own, but it’s highly unlikely they’ll have a turnkey solution for you.
Check here, scroll down to “Windows computers.”
https://avid.secure.force.com/pkb/ar...ols&popup=true
Or:
Check out a Sweetwater Creation Station, or Pro Tools PC.
https://www.sweetwater.com/shop/creation-station/
https://www.pro-tools-pc.com/