Joe,
I believe the Eckels were/are a rack that one ordered with the car, or could get aftermarket. I think the $2,500 might be a bit high--if you don't want them and will never use them, (and you are not in need of $$$ just this moment), keep a look out over the next year or so, and watch ebay and related, and see what comes up. You'll get a better idea of true value, and then you can either keep or sell them with a bit more confidence.