I love 3 cent nickels. They're hugely underrated, especially the semi-key dates. Lots of die clashing, cracks, and cuds, Longacre doubling, DDO's, etc. Totally affordable too. Here's one I just got.
It's funny... at the Philadelphia ANA one dealer told me that 3-cent nickels were selling like crazy for him, and another dealer told me no one had been buying 3-cents for a loooong time.
I just bought A very nice three cent piece the other day. I dont know what the grade would be though.
You can find a lot of funky things with the nickel 3 centers. From weird die breaks, to strong clashes. Even the occasional re-punched date exists on numerous dates. Frankly, it's a series that is truly unappreciated and is the best bang for the buck.