Yeah, so what everyone is trying to say is dont clean those coins.
Leave them as is.
They will hold their value uncleaned. I've never heard of a rock tumbler being used and Ill tell you I cringed when I read your post. Those poor coins!!! If I may quote his own guestbook:
"Name: Bill on 10/6/2005 said:
Subject: Rock Tumbler
Message: This has to be the worst bit of advie concerning the cleaning of coins ever posted on the internet. Even if it was intended as a joke, many will take it seriously. Cleaning coins with anything stronger that distilled water is a VERY VERY bad idea."
"Name: Kenneth Engelhardt on 9/29/2005 said:
Subject: Cleaning Coins in a Rock Tumbler
Message: Cleaning coins in a rock tumbler???? You must be out of your mind to post this misinformed garbage. TO ALL OF THOSE READING THIS: DON'T FOLLOW THIS CRACKPOT'S ADVICE ABOUT POLISHING YOUR COINS IN A ROCK TUMBLER. YOU WILL PERMANENTLY RUIN YOUR COINS!!!"
"Name: Ed on 9/29/2005 said:
Subject: No way to tumbling
Message: This is the worst advice you could give. Is this site some kind of joke."
I recognise those names from around here... ehh guys?
If you want to get a general idea how much your coins are worth you can check here:
http://www.pcgs.com/prices/You may or may not get the price that is listed for each coin if you choose to sell them. But it will give you a general idea of thier worth and you can count on not getting close to what is listed if you clean them with a rock tumbler. Check 'em out and let us know if you have any with BIG numbers next to it

-Bobby