Can you sell built prime parts?

Excuse me, I couldn't help but notice the mention of "built prime parts" in your statement. Could you please elaborate on what you mean by that? Are you referring to components or accessories that have been specially designed or modified to be of superior quality or performance? If so, would it be possible to sell these parts, and if so, under what conditions or circumstances? Additionally, could you provide some insight into the potential demand or market for such parts, as well as any potential challenges or obstacles that might arise when attempting to sell them?