So actually you want the OP to trade the altcoins that are being included at the paper wallet for less then they are actually worth.

I believe that the best way for you to get the maximum amount of money for your paper wallet would be to activate and redeem the altcoins by yourself.
Download the wallets( I believe that you own 0.1BCH,0.1BTG, and 1 bitcoin diamond),and after redeeming the bitcoin from the wallet, sweep the private keys to redeem the altcoins.
Sell them on one of the major exchanges and you will get maximum pay for your paper wallet with Zero risk.