keep the ones, cuz one is a low serial #, and the other is from 1974, which from bill bundle hunting the oldest bill ive ever found is from 1977, so thats pretty good, but the 100 dol. bill is from a run size of 1,920,000, and 100 dol. bill staras are generally worth less than other star notes...hope this helps, and if u think they are cool, and have the cash to keep them all then do that, but this is just what i would do if i got those bills in change. good luck!