Hi Dan, There is no need to feel like an idiot. It is the fault of the criminals who want to take advantage of people who dont have the experience. You definately need to get that book. I have 1,000s of dollars worth of reference books. (I have several collecting fields). Although the McDaniel's book is expensive, how much did you spend on the bad items you have posted here alone? Over time, that 100 dollar book will save you so much more than your intial investment. Before you buy one more item, BUY THE BOOK!