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Most importantly, a price break and available quantity must be set. For free items I typically just set a negligible price and set the quantity to whatever was received in the sample or donation.

Ranking Suppliers

The NER vault has already been setup to limit results to suppliers that are trustworthy/workable for us and limit to USD pricing. By default the ActiveBOM will sort results by cheapest, including price breaks. Sometimes we would prefer to limit how many suppliers we use to save on shipping. To make this clear in the BOM we can override the ranking completed by Altium.

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Altium will still use colors to show that other suppliers are more or less recommended (due to supply, price, etc), but your override will now be forced to the back.