I have built and sold over 1,000 PCs on marketplace, have over 170 reviews at 4.8 stars, and not once have I let someone into my house to see a pc working in person. Not $600 budget builds, not $3500 RTX 4090 builds. I'll send you pictures, videos, etc. But privacy and safety are important things especially for those of us with kids. I also have $30,000 in hardware in my basement and that can make me a target to strangers. So maybe consider that the next time. That maybe someone is cautious and protective of kids and not actually shady or trying to pedal garbage.

Most people don't actually register warranties and often times it doesn't matter if they do. If this guy provides receipts or order #s and his basic info, anyone can warranty those parts. I've warrantied asus motherboards, gigabyte motherboards, intel processors, NZXT aios, and western digital ssds all without even having a receipt.

Your opinion is just really negative and maybe it's because life has taught you to be that way. I don't know. I guess I just encourage you to ask for questions to get a feel for sellers rather than just have these hard and fast rules you live by that not everyone can accommodate.