Question How do you even build a PC anymore ?

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I'm not locked into $300 for a card, just the highest cost I could find in stock online most places. I think I paid about $800 for my 1080ti when it came out. I'll give it until summer and see where things are. Thanks for the time.
 
How do you even build a pc anymore? Is it just as hard to get a new motherboard and psu and ram? On both of my previous builds I would wait for the right gpu to come out and then build it with a new motherboard and psu and ram and cpu. How do you do that today?
Just before BF last year, I purchased all the parts for a whole new system.
In my sig, Raptor.
Approx $1800USD.