Don't know about the first cam, but the other cams with a couple of dinged up lobes are at the least worth core money. You can weld and regrind them (which I'm sure you know) as long as the new lobe isn't a huge change from what you have.
And as long as they are 8620 cores. The cast cores probably have little value.
Pretty sure these were referred to as billet cams. Cam technology has changed so much over the years with higher spring pressures that I swore if I ever had valve spring issues I would go back and try one again, but I've been pretty lucky. I ran 9.82 with one at 2800 pounds with a stock crank, 906 heads, and TRW pistons over 30 years ago so they worked pretty good. Most of my stuff now that I'm working on has over .825 lift (and up)
