Define "pristine". Do you mean mint-state? only gem uncirculated? Will uncirculated details suffice? My point - definitions of this word vary greatly between collectors. That's why it is seldom used when describing coins.
When I here pristine, Brian, I personally think of original, not necessarily high grade. Just nice, original untouched coins, no matter if they are AG or MS, thats why I went with early copper.
In that case, I'll go with 18th Century Flowing/Draped dimes and half dimes... How often do you see wholesome, original examples of those things?! I sure don't too often... It seems like they've all either been cleaned, damaged, or developed some sort of corrosion. And as result, the "pristine" ones will cost ya and arm and a leg...
1932D quarters are very difficult to find in pristine condition. Also, the further backwards you go from the 1950's, the more difficult it is to find coins in pristine condition.