^ that's actually very reasonable for what's inside.
Gotta figure there's 3x kinds of prebuilts.
1. There's the 'big box' outfits like Dell, Asus, Lenovo, Sony, HP etc. You get the cheapest of the cheap as far as everything goes, some stuff may or may not be proprietary, but the price savings per unit often mean higher spec'd stuff.
2. Quasi-boutique. That's ppl like ibuypower, CyberPower PC etc who use aftermarket parts to build a pc, but those parts are also often built under contract by aftermarket companies, so you get ibuypower aio coolers built by NZXT etc, cases built by Aerocool etc. These are often higher powered systems, built for performance at a reasonable price, but the builds are shortcut by being slapped together, little QC, will require bios adjustments etc.
3. Boutique. That's Falcon Northwest, Puget, Origin etc. This is pay for play land, where the sky is the limit and so is the budget. You'll get brand name, top line parts, custom build, custom ordered, plenty of QC, testing, tweaking, wiring, sexyest pc's on the planet. But you pay for what you get and there's generally no corners cut except by the person doing the ordering.
So #1 is decent and somewhat cheap, but not really upgradable ans not repairable except by them, #2 can be upgraded, is better, but comes with worry, and #3 is the best of the best in everything, except the worst pricing.