Wow, that might have been one really expensive summer camp, especially if the cards really were in good condition. At one point in my life, I had so many cards I don't think my mom could have phsyically thrown then all away! Literally, I probably had some 6 figures of cards - I had many, many of the 3000-5000 count boxes full plus dozens - maybe near 100 of 800 count boxes. About the most value I ever got out of them though was when Joe Montana's RC went to like $100 and I had 4 or 5 of that one. I grew up in North Dakota and we had a large basement where I stored most of them - then after I was older and out of the house (my younger brother was still there) it got flooded (the Grand Forks flood) and they were all ruined JJacksET4
There's actually 3 symbol conventions for preferred shares and other special issues (warrants, rights, when issued, etc). In this page you'll be able to find all 3 of them... CQS, CTS and NASDAQ's http://www.nasdaqtrader.com/Trader.aspx?id=CQSSymbolConvention