When I want a cheap plastic thingy, or cheap hardware and electronics to play around with, I get it off aliexpress. It's virtually the same stuff as amazon just for the patient. Most of that stuff is made in China already even if I get it from an online or local brick and mortar retailer, so it seems more direct to me, avoiding needless retransportation, warehousing and waste.
When I want a quality thing I buy it from a local shop, especially when I need to see it or compare before buying. I can often find a Canadian online retailer too with just a bit of sleuthing.