which ABS pellets are good for making filament?

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I know there are companies that sell pellets targeted at "home" 3d printer filament extruders.
But the cost including shipping (to Persia) kind of beats the purpose for me for making my own filament from such pellets instead of buying. But I have managed to find some local sellers of ABS pellets, but of course they are not for 3d printing specifically.

So my question is what kind of "pure" (no colorant, agents) ABS pellets work for making filament for 3d printing in general? Or does the A, B and S ratio not make much difference to care and they all are not different in this regard?

I would assume since people are making their own filament extruders now, and even recycling plastic from their old electronics covers and even refrigerators into filament there should be some data gathered by now on whether some ABS types are no good for 3d printing or which are better.

The ABS pellets I have access to I think is produced locally in a factory in nearby city.