I use bicentennials as a marker for rolls. I have kept every from halves and quarters boxes I have gotten, so in the event I get a box without one, I will assume I already saw that box. so far less than a roll worth per box of quarters and 6~9 rolls of halves per box. it makes me feel less bad when I keep SOMETHING from a box instead of searching a whole box just to have nothing from it. semi-related it is why I was happy to find a 1970-S in a box of dimes, because there was nothing in it at all worth keeping, no Canadians, no 2009's, no silver, just mostly 1980's. So as long as I have the extra to keep them I will so that I always keep something from every box I hunt. Now if I find someone that wants 9 rolls of halves that won't let them back into circulation so I do not see them again in boxes, I will happily part with the 9 rolls of Phillie '76 halves without regrets at face value even.