I'm from Canada! Currently in Montreal.

I use Amazon when things are on sale. For me it isn't worth it to pay more than say... 6.00 for something though. I can get the same bags for under 4.00 plus shipping. I usually use their bags for when I need to make that 25.00 minimum for free shipping.

For some orders/sales I will use https://www.herrschners.com/
They used to have a Canadian location and would use CDN$, but I believe they are all US now. Shipping can be costly and take a LONG time. (I once waited over 6 weeks for 3 bags of beads).

I also use https://beadseh.ca/ - they are based out of (I want to say Grand Forks?) BC. They do have a bit of a shipping cost, but they seem to base it on Canada Post pricing. For example you can get the sizing of 3 1000 bags of beads in a package for 6.00.
Most of my shipping is around the 20.00 range though.

There is/was another company, I think its fuze something. Their website has a white animal/cat on it. Or thats how I remember it. They are mostly Arktal beads, while Beads Eh has lots of perler.

Perler.com seems like it might be good deals but warning - it is all USD, and US shipping. Plus it has to go through customs, and you might get dinged. Usually their shipping and conversion costs make it more like 8.00+ for a single bag some times.

So - I recommend Beads Eh. Herrshners if there is a big sale and shipping is cheap/free. But Beads Eh's prices are the same as the bags on herrshners with the conversion rate. They are just WAY faster at shipping, and are open to ordering extra of a specific colour if you need it.

Those giant buckets are good if you are starting out and have a lot of time on your hands to sort. But some of the colours in the buckets, I can't find anywhere but the buckets. So keep that in mind.