Items aren't assigned when you order, but when it comes time for your PC to be built said items may be in stock by then or there may be a wait til they are, if there is no sight of when more are to arrive you would be emailed to decide whether you want to wait or change to a different componentIf my "component" was in stock at time I placed my order, but is now gray (if I was ordering a similar machine) - have I secured a unit, or not?