I bought a couple of there .557 small block kits for like $175 each, and a couple of the 284/484 kits for $180, I noticed alot of there cheaper priced kits were all dated in the early 2000-s and some looked like there were org. sent to another vendor, but they all came from summit.

There 508/292 kit stays at $300 or better but I got the kit off ebay in a obscure listing for $150 shipped.

As well there popular .528 solid has stayed high like the 508 hydro.

Maybe rotating the stock?