To get a better idea of what you should expect to pay:
https://www.amazon.com/dp/B09B1HYPR9 This card is from a reputable company, and will serve you well.
I bought these items....
ASUS ROG STRIX Arion Aluminum... https://www.amazon.com/dp/B07ZKB4SLK?ref=ppx_pop_mob_ap_share
With accompanied ssd...
SAMSUNG 980 PRO SSD 1TB PCIe 4.0... https://www.amazon.com/dp/B08GLX7TNT?ref=ppx_pop_mob_ap_share
And...
SAMSUNG PRO Plus + Adapter 512GB... https://www.amazon.com/dp/B09B1HYPR9?ref=ppx_pop_mob_ap_share
USB C Hub,UtechSmart 6 in 1 USB C... https://www.amazon.com/dp/B09LCLDCFK?ref=ppx_pop_mob_ap_share
And....
Stand Base Compatible with Valve... https://www.amazon.com/dp/B09QYG75W3?ref=ppx_pop_mob_ap_share