buy their stuff

[navi tasan]

Is this correct:

1) They produce sports goods. I buy their stuff. I never use it, but I buy it.

My problem is that I don't buy all of their stuff. I buy some of their products. I am not sure 'stuff' and 'it' have been used correctly here. But I think the whole thing is correct.
I know that 'stuff' would only be used in informal English.

Gratefully,
Navi.

[emsr2d2]

I don't think anyone would assume that you meant you buy everything they make. "I buy their stuff" would generally be taken to mean that you buy some of the things they make.

Both "stuff" and "it" have been used correctly. I'd remove the comma before "but".

[Tdol]

I buy all of their stuff would make it clear. As the original stands, I would not assume that you meant every single product. They might be the only brand you buy, though only would make this clearer, but it is far from implying that you buy everything.