What have I got here?

Sure look like 1973+ A-body calipers & rotors, but could be B, E, or FMJ body for all I know. Look almost new, so might be worth $300 for the set w/ spindles. Throw in the control arms and maybe more, especially if the LCA's have sway bar tabs.

For any of it, a local sale is best since shipping such is $$$. If you want top dollar, you have to do the research, verify diameters, PN's, etc. Otherwise, it is a crap shoot for the buyer. If you already listed as SSBC setup, you have lost much faith from shoppers.