OTOH, before the main consumer storefronts were the kind of flea markets of no-name sellers that used to roll into county fairgrounds every couple months, you could actually find good retailers with not only strong return policies, but also focussed on quality parts with a high S/N ratio in their catalog, that even offered added value (including, e.g., mounting CPU and memory when bought with a motherboard.)

Some of those same places survived, but they don't do consumer retail anymore.