This bracket has thinned out. The 120GB and 240GB capacities that used to fill it have largely been retired, because the controllers and packaging cost roughly the same whether a drive holds 240GB or 500GB, so makers stopped building the small ones. What survives here is mostly 2.5-inch SATA, occasionally an M.2 stick wired for SATA rather than PCIe, and if the listing below comes up empty on a given day that is the bracket being genuinely bare rather than a stock hiccup.

Buying at the very bottom is still worth it in one situation: an older laptop or desktop that is still booting from a mechanical disk. Swapping that for any solid state drive changes how the machine feels within minutes. It stops being worth it the moment the capacity is too small to live with, because a drive with almost no free space has fewer spare blocks to work with, slows down as it fills, and wears through its endurance faster. If the next capacity up is close in price, take it and skip the second upgrade you would otherwise be making in a year.