I am trying to trade up my connect:amp to an amp and though all four of my sons products appear, I cannot select them to trade up. The amp is listed on backorder. Is that why? I tried putting the amp into my cart and then it says there is a 2 day delay but the price is not discounted by 30%. Please advise. I am trying to fix the issues with my sound system and I think this more powerful amp may address them.