When I first started roll searching, I kept every coin with a die chip and carefully put it into a 2X2. After amassing an album full, the ones I find now just get tossed into a box. I have literally hundreds of pennies with die chips. They are very common and now the only ones that get a 2X2 are the ones that have a chip in an interesting spot. Personally, I wouldn't pay any premium for one.