When you search notes long enough you will realize that the numbers you thought were a find when you first start are so common they really have no value. The real keepers are the numbers that just don't show up very often and make them a good find. Problem is, since they don't show up very often a person who gets very few notes won't find any of them. That is why words like trinary are born, so that person can have a "find".
I try to never tell a person what to collect or what not to, God knows I keep some silly notes that would raise the eyebrows of my fellow collectors. Collect what makes you happy, it's better to save a note then down the road realize it is just a spender, than to spend it and then realize you should have kept it. So I say save those questionable notes.
Saving money is not a bad thing! As you get more into it you will see that a number with 3 digits are a dime a dozen and you can then use those trinary's to purchase a note that actually has some collectible value.