Just my opinion but I don't hold much stock in finding too many keepers from "handrolld" coins. Somebody could of just rolled them up 20min before they dropped them off at the bank. I have always had great luck in just searching regular CWI boxes of dime and on average found 2 or 3 per box. If I came across some handroll's I would buy them but if they wern't available I would certenly buy a box.
Now there is a chance that you could get your hands on some old rolls from back in the day but you would have far better luck in just getting boxes that regularly produce compaired to trying to get lucky and get solid rolls at one time. Again this is just my opinion, and just as it works for finding half's, the more volume you do the better your finds will be.