Have you considered taking the 5 cent back to the shop and asking the dealer why he priced it at $8? Mayble he will tell you something you are not seeing. If he is helpful you may end up wanting to buy from him again.
I picked up one of those nickels also, I like it, and I run into the 67 pennies now and then so it is another piece of that year set.
If you PM me your address I'll mail you one. It probably won't be until next week i get it in the mail but I've got one I can send you.
I found one in my collection. I really need to get some coin software like other people have mentioned. Sometimes I end up buying cheap foreign pieces that I already have.