Barrier, I'm far from an expert, but I would not buy used lug nuts to use on my car. I have replaced all the lug nuts, locks and the plastic covers on all of my vettes more than once. Each time I bought new from Mid-America. Just my .02 cents.
Berrier, I have found over the years that most people do not change their own wheels as I do. They will use a local shop for repairs and tire changes etc. Most shop will used air guns to loosen and tighten the lug nuts, which I find tends to get them out of shape. Also I believe that over tighting the lug nut will stretch the wheel studs. I have seen some ugly wheels and lug nuts as a result of over tighting them. Hope this helps.
I am replacing the Chrome Thinspokes I now have with Painted Thinspokes, as well as new tires and TPMs. I have the full set of Chrome Lug Nuts and Locks that are now on the car. I could use them but I would like to see the look with the OEM set-up. I am not even sure what the full set will cost from the Dealer but I would like to save a bit. As long as the covers are not cracked, the nuts and locks not stripped I don't see the problem. I am not looking to get a set from someone who Tracks their car and changes tires often.
I was hoping to find someone who has made the opposite swap of Painted to Chrome. Many people seem to change out their wheels after low mileage with little repetative removal of the stock items.
Incidently I have used a Torque Wrench for lug nuts on all my cars at least since my first Vette bought new in '68, best way to go. I even criss cross and tighten in stages.