I think the most expensive one is the zinc 1982 Philly. Small date. But it's nice to collect the whole set. 7 coins. 82P 82D copper large 82P 82D zinc large 82P copper small 82P 82D zinc small
https://www.amazon.com/Lincoln-Cent...words=Lincoln+Cents+All+7+Varieties+in+Holder That is funny you say that I almost bought a whole mint set for under $7.00 last week.
http://www.numismaticnews.net/article/rare-1982-d-small-date-copper-found I assume this is what you are referring to.
The zincs weigh 2.5 grams. I went through my 82's and I need the 82 philly zinc small. I have 6 of 7. (Not even going to mention the 82D copper small.)
Not including the SUPER RARE one, the one I am missing is the highest priced one. Figures. I will get it one day in circulation, or metal detecting. I could buy it, but it's more fun in the hunt for it.