(XBOX)Muttz v2

I believe when a prime set is offered that contains a main blueprint (they all do) then a list of parts in that set will appear just above it in the trade window listing what parts are in the set and marked with a tick or check mark if present. If multiple blueprints are offered it can make the list not appear. Atleast its this way on xbox. Something to look out for if your not sure whats in a set.