I noticed these today when I was cleaning up. I guess I bought a new set of plugs for the 283 about 3 1/2 years ago. Since that engine won't be in my car any more, and these plugs don't fit big blocks, they need to find a new home. You can do your homework to see if they are right for your car. I know they fit 283 and some 327 as well.
I think a site donation of $20 should be fair. I don't think you can buy them any cheaper elsewhere.
I will give free delivery to Tuesday night coffee next week as well.