I had my Xbox series x for 2 years and then it decided to die, so then I called Microsoft and sent it to them and they sent it back with nothing done to it and said nothing back, then I called them and they said they can’t do anything, then I took it into a local repair shop and they found the issue but were not able to resolve it, the issue was that the graphics card processing chip broke, I was wondering if you guys could fix it
or if I could purchase one of these?
sounds like Microsoft. I went down that way two times allready. 
After several calls they offered me a 300€ repair (exchange for a refurbed console)
If you don’t have the tools to repair it yourself, it maybe cheaper to sell the defect xbox and buy a working one.