I have a lower with tube and spring, mag release, trigger guard, safety, A2 handguard and front pin. All you need is rear pin and trigger assembly, and of course an upper. It has seen very little use, the only blemish is very small nicks by the paddle release. Common for an idiot who didn't protect the receiver from pliers. It's touched up, and you really don't notice, but I mention it, because I'm upfront.
I would like to trade for a AR15 carrier and bolt, and a bushmaster collapsible stock. Used is fine, but it must look and work great. If you are not in MN, I would need an FFL to send it. Here is how I see it. What I have is around $150. A bolt setup is around a $100, and the stock is around 50. So I would also take a bolt/carrier plus $50, or a stock plus $100.