Stripped bolt carrier or cheap bcg

[Thesmart1]

I have a bet with a coworker, who can build and ar15 the cheapest. I know I know. Only need one last piece so I'm looking for a bolt carrier with key or. Cheap BCG. Let me know what's out there. And I already know where I can buy a new one for $100 but I already have a bolt and I need it as cheap as I can get it.

 

[spider2k]

you can get new for $79 actually. not sure how much cheaper it gets.