Posted By:
Gilbert MainesTE and Dylan: Do not sell yourselves short. Your collections are important enuff to get the best reference book available on card authentication.
You will need to refer to it frequently, even well after you think that you have the hang of it.
It is typically available on the internet (sometimes even eBay) for about $25. quite a bargain. Well written and even understandable. And better: if you have questions on it, well, bring those questions here. But buy the book.
Oh, I forgot. Search under the word "cycleback"