I bought a mouse from Ebuyer in 2017 and don't remember having problems.
I'll happily re-use Kustom PCs and Quiet PC when they stock what I want.
Otherwise, I made several orders to Scan without problems.
Never bought anything else, got nothing to compare it to, except Intel's are generally more expensive (also compatible motherboards), and budget's always been my go to factor
Supposedly 32 is the new 4. I'm still on one 16, got an open slot for another, waiting for ddr4 prices to implode.
SATA and a couple of others which I haven't tried, USB3 is the new USB2 (and so on)
I do for the same reason except for the buy part