This isn't a good recommendation. A powder scoop measures a volume, where as we in the PED community are usually concerned with measures of weight when talking about active ingredients (milligrams, grams, etc.).
Different powders have different densities so a scoop that can accurately scoop 50mg of table salt will usually not be able to measure 50mg of Anavar, for example, unless table salt and Anavar were similarly dense.
That being said, there are accurate enough milligram scales available on Amazon. I think the Gemini is the most commonly recommended. You can get a calibrating weight set that has some milligram weights to check accuracy if you're that concerned. If those scales were even 20% +/- accurate (and my experience is that they are far more accurate than that), it wouldn't matter much with an active like Anavar. With an active like T3/T4, measured in micrograms, the difference would be more significant.
If you are working with an active that your scale can't accurately measure, you should consider volumetric dosing (see:
Volumetric liquid dosing) or geometric dilution (see:
Mixing of Pharmaceutical Powder - Pharmapproach.com).