bob, on the dime, if it is mint state, yes - or - if it is the variety that has the 2 stamped over the 1, then it would be worth alot in any comdition. Mint mark plays a role as well.
As far as the silver cert, If it is crisp uncirculated, I'd keep it, just cause they are cool. Otherwise, unless you have a rare signature combo, or a misprint, its' worth a dollar.