If you are "investing" go for the top end perfect stuff. If you are collecting do it because you like what you are collecting. You can not garante that a specific collection will go up in value or that you can actualy sell it for that supposed increased value. I am into dice more than chips and would rather have drilled unmatched serial numberd dice than no dice at all. i also have a limited allowance so I grab what I can get and jump on the bargains whne I find them. If I win the lottery then I will "upgrade" all my dice.