If nothing else, Mouser has one enormous usability flaw (which has been an issue for years): you can't sort by price. Or rather, they will let you sort by the

If nothing else, Mouser has one enormous usability flaw (which has been an issue for years): you can't sort by price. Or rather, they will let you sort by the "pricing" column, but the effect is to sort parts by their unit price at whatever the minimum quantity for that part is. But some parts are orderable in single quantities, and others only in large trays or reels. Even if you manually filter out those packaging types, it can often be the case that part A is cheaper than part B at qty 1, but significantly more expensive at (say) qty 20. So you can't actually do price comparisons without paging through the entire list, which may be many hundreds or thousands of pages depending on what you're searching for.. Digikey does the much more sensible thing, which is to let you enter the quantity you actually want, and sort items by what their unit price would be if you order that quantity. Mouser has a similar box to enter the quantity, but it only affects the display of each row, and not the actual sort order.