You will find the best deal by buying by the bushel....I googled daffodils by the bushel and came up with a lot of sites.....here's one.
Linda C

Here is a link that might be useful: bushel of bulbs

I buy from Colorblends and am looking out at the beauty of the hundreds of bulbs I bought last fall. Buying in "bulk" can be cheaper than the garden center but really Colorblends is not cheap. I do think though that if you look through what they have and also Van Engelen you can find some deals. Right now there are 400 muscari blooming in my yard and it was not too expensive. I also got 100 "Segovia" daffodils from Van Engelen which I mixed in and although they are smaller than most daffodils really are nice and were inexpensive.

broomhildah, if you are talking thousands of bulbs, all to be planted this autumn by yourself and only yourself, please rethink this idea. I've done it two years running, and it's absolutely exhausting. I now have enough bulbs that I have to limit myself to hundreds of new bulbs this Fall. Better to plant a few hundred each year for several years than find yourself outside planting in the snow and mud and rain as I have in past years.

Trust me on this. The ONLY reason I overdo it is because I have major mental health issues every November (anniversary events out the wazoo), and I NEED to be outside digging to feel safe.

If you have plenty of strong backs, arms, feet and spades, then that's a different thing altogether. If you can risk waiting, then the big box stores often have huge sacks of generic daffodils for not much money. Still, it pays to comparison shop, because sometimes the big sacks are no bargain.

If you comb the Colorblends and Van Engelen listings, you can find large quantities of certain daffodil and tulip varieties at very reasonable prices. In the daffodils, look for the words "landscape rounds".

Lisa, who is completely beat from "merely" doing a week's worth of daffodil deadheading today.

You can try Colorblends or Netherland bulb co. Netherland bulb carries smaller "landscaping" bulbs (e.g., tulips in the 10-11cm and 11-12cm. You have to call or email them to get a catalog, as they're mainly wholesale. Minimum order is $75. http://www.netherlandbulb.com/index.htm

Go to www.netherlandsbulbs.com and check out their selection and proces. Then, get the paper catalogue from them; bulbs are even cheaper there than on the website.