r/StainlessSteel

I am starting a small manufacturing project making kitchen accessories. I need stainless steel coils in 304 grade, about 0.5mm thick and 200mm wide. I have been looking on Alibaba and other marketplaces like eBay and amazon but I am not sure which suppliers are reliable. The prices vary a lot where some sellers offer coils for two dollars per kilo while others want five dollars. Has anyone here bought stainless steel coils from online suppliers? I am worried about getting steel that rusts or has inconsistent thickness. I only need a small quantity to start, maybe five hundred kilos. Any advice on finding trustworthy suppliers would be great.