coins with small rim
Cud and die chips depend very much on the buyer and what they are willing to pay. Some are terrible hard to find but aren't worth much on the open market, others are due in part to the deterioration of the die and so might be much more common but up and till a certain point they are overused dies are retired so you don't get large
Cud and therefore larger ones are often more valuable and rarer.
Rabbit ear is probably the better know errors that has some collectable but also quite findable.