I also wouldn't be surprised that some of these products are specifically designed by major brands for the cheap market, only relabeled as something else.
Back in California, the amount of things you can buy at Dollar Tree and 99-Cents Only was fantastic. Here in Michigan, Dollar Trees have taken over, but they have a better selection their counterpart back in SoCal: White Turkey Meats, Turkey Hot Dogs, name-brand snacks, especially the amount of candy they have is dangerous. Wouldn't touch their electronic goods, though, more specifically the surge "protectors" and the extension cables.
The 99-Cents Only stores have pretty good deals on plants and produce. I used to OD on bags of Kiwi when they were on sale. Plus, I loaded up on a bunch of carnivorous plants and made a decent size terrarium full of them.
Also, FYI, don't ever buy those scented hot-oil burners. I lit one and found that the black metal was actually some type of cheap spray-on coat that bubbled up, eventually causing the oil to explode which left me with a ceiling-high mess that took an hour to clean.