Most of the spices the supermarkets round where I live sell in their ethnic aisles are the same brands sold in the Asian grocers around here, and the supermarket are expanding their bulk buying ranges too. They are just not Schwartz - the Chinese shop in the indoor market sells that brand, only in much larger sizes than the silly little Schwartz jars the supermarkets sell. The nearby West Indian grocers has diversified, presumably because not many West Indians live in this neck of the woods - it's mainly eastern European, Asian and West African. There is a huge Chinese wholesalers a few miles away that also sells to the general public, but I haven't investigated them yet.I wouldn't go near spice jars; never have done. Back in UK I would travel some distance (either Liverpool or Leeds) to buy from the Pakistani grocers.
ElizabethB Years ago I used to have a Costco trade card which meant I could get stuff even cheaper from them. They were the main suppliers of some non-food stock we used to sell in our shop. We could also get stock from Associated Dairies (ASDA, now part of Walmart). I was never tempted by the food from either of them.