Any interest in doing this?  We likely can all agree that most powders and primers are worth about the same as each other.  I'm not so critical that I'm worried about a $5 difference.  So, I'll start the offering:

I have 1000 each of LP, SP, LR, SR primers that I'd be willing to trade to someone who needs them, equally for a lb of rifle powder that I can use.  I use Varget, AA4350, AA 5744, IMR 3031, IMR 4831, Lil gun.  I'd take Trailboss at a rate of 2 bottles:1000.

I don't need any powders, but I have a large order of primers that came in, so I'm just offering to help those who can't find any.  I won't sell them outright, and I want to limit trades to 1 brick or 1 bottle, to spread it around.