What I tend to do is buy ONE of the cheapest chinesium I can find. If it doesn't suck completely, I may buy more. I just bought 60 inserts (ccmt and such) from Alibabba for $30. That's $0.50 each. The name brand "American Made" are looking for $10 to $15 each. The $0.50 inserts work just peachy.
A dirty secret of a lot of the "American Made" brands, is that they're really made in China, just during the day. Then the night shift comes in and everything is made with the same materials on the same machines, but with a slightly different sticker put on them. Cisco did this, and then was surprised when the clones still had their trademark information in the source code.
That said, I know that every time I buy one of these cheap tools, that I'm rolling dice that the $0.50 part will do the work to some level of acceptable. The $15 just gives you the confidence that you know you won't have to throw it out and wait on another shipment. If I were doing this for a living. . . ah hell, who do I think I am kidding. Y'all know I'd do the same **** thing.
If you need endmills, look at getting some regrinds. I bought some for $6 each off eBay a couple weeks ago. The 1/2" endmill only had 3/8" cutting length, but I can't even cut that deep on a Rong-Fu 30 clone, so it isn't much of a problem.