Just bought a few Die-Cast from a brand might currently have the best value to quality ratio by far. It's a Chinese company called "Caipo" that I found on Ali Express that has dozens of different models like these.
They're only $5 each shipped and seem to be scrupulously accurate in their scale labeling.
Did a review with lots of words and pictures here...
... as well as scans of the collection brochures.
The selection does lean high-end and euro, but there's still alot of the sort of everyday drivers that I'm always looking for.