is this a good 2000 dollar build but i found a used tuf rx 6800 xt so its about 1400$

yea i know that its 2000$ but i found a used tuf rx 6800 xt so its about 1400$ and the case is the lc power 705b. so is it good btw i aint buying from amazon im buying fro these three sites:

1. https://www.links.hr/hr/

2. https://www.hgspot.hr

and from here is just the motherboard 3. https://www.instar-informatika.hr