My son has built several PCs. When I bought my new desktop (Dell XPS tower with 11th Gen i7-11700, GeForce RTX 3070 with 8Gb, 64 Gb RAM, 2 Tb HDD, 1 Tb SSD, and 500 watt PSU) on sale for $ 2100 ($ 400 off regular price), I asked my son to comparison shop a new build and if he could do it for cheaper, I would pay him. He uses the Newegg custom PC builder and PCBuilder.net. He said that he could not build it for as cheap as Costco was selling it plus it was very difficult to find the GPU in the supply chain at the time. From what he tells me, a lot of parts are still scarce.