My orders are from bulb dealers which import into Canada.
I have focussed on "perennial" tulips, and large size bulbs ( 12+cm and 14 cm bulbs for tulips.)
I remember ordering "Ice Follies" and "Tete a Tete" daffodils.
Yes, it is more effective to have swaths, or large groups of bulbs of one kind.
I ordered about 20 bulbs of any one kind.
The mail order companies send the bulbs for the end of September here.
I shall try to get "Dutch Master" daffodil bulbs here locally so I can plant them in September.